Stop signal

What is a stop signal?

A stop signal (also called a non-verbal safeword or silent safeword) is the sign you agree on in advance to end a scene without saying anything. Two taps, or letting go of an object you were holding. It does exactly what a safeword does, and you need it the moment talking becomes impossible.

How a stop signal works in practice

You agree on one movement, you rehearse it cold, and from then on that movement means the same thing as the word.

Cara Dunkley and Lori Brotto describe in Sexual Abuse what people reach for when someone is gagged: clapping their hands or snapping their fingers. Alongside that you see the object version everywhere. You get a bunch of keys put in your hand, you hold them while things are good, and you drop them the second they aren’t. The signal is agreed while nothing is happening yet, rehearsed once, and then nothing happens with it for the next forty-five minutes. That is exactly what it should do.

How you pick a stop signal

On whatever will still be free, not on what looks handy now. That is where the trap sits: you need a stop signal the moment your voice drops out, and those are often the exact situations where something else drops out too.

1. Look at the hands. If your wrists end up fixed to a St Andrew’s cross or behind your back, clapping is impossible. Tapping with one finger or opening a fist works then.
2. Look at the sound. Clapping and snapping are audible, so they work even when someone is standing behind you. A fist that opens has to be seen, and under a blindfold you don’t know where the other person is looking.
3. Pick something you won’t do by accident. Struggling and tensing happen on their own. The signal has to stand out above that.

Why people would rather agree on a stop signal than gamble

Because the scenes where you need it are the exact scenes where nobody can improvise anymore. The pull isn’t in the gesture itself. Knowing there is an exit that costs no words means you don’t have to test halfway through whether you can still stop. With a gag or a hand on the throat, that is the difference between living it and just enduring it.

• For the one giving the signal there is nothing left to argue. The gesture is complete in itself. No sentence has to follow.
• For the one watching, the guessing disappears. Without an agreed sign you are reading movements that could mean anything.
• For both, it lifts one worry out of the scene that would otherwise sit there the whole time.

A gesture is more fragile than a word. It can be missed, it can be confused with resistance, and it only works as long as the body part that makes it is free. So agreeing on a stop signal isn’t one choice, it is a choice per position.

Why Dutch has three words for this and no dictionary entry

Because the scene borrowed the word from the road, and there it was already taken.

The Woordenboek der Nederlandsche Taal, the historical dictionary of Dutch, lists stopteeken twice, under STOPPEN and under TEEKEN. Search it for stopgebaar and you get zero hits, while stoppen gives eight. The newspaper archive shows the same ratio: 8,338 articles with stopteken, 2,768 with stopsignaal and 45 with stopgebaar. The word the scene uses most is by far the rarest one in Dutch.

The oldest source I could track down is in Het nieuws van den dag voor Nederlandsch-Indië of 17 December 1925, in a complaint about traffic traps in Batavia: on Molenvliet Oost there is suddenly “the stop signal of a policeman”. A hundred years old, and already carrying today’s meaning. A sign you don’t argue with.

That you have to fix such a sign in advance isn’t a scene invention, by the way. The Dutch traffic-rules regulation of 1990 states in article 82 that hand signals are, “as far as possible”, the gestures laid down in annex 2, and requires drivers to obey the stop signal of a school crossing guard recorded there under number 8. And annex 2 says a lot: it consists of two drawings and not a word of text. A stop signal can’t be written down. You have to show it, and the other person has to recognize it.

Misconceptions about the stop signal

“A gesture is a stopgap.” It is a full agreement with the same meaning. What happens after the sign is identical: everything stops, equipment comes off, nothing gets negotiated.

“Struggling counts as the signal.” No, and that is the most dangerous assumption. In a scene where resistance is part of the role, like CNC or a kidnapping scene, fighting back means nothing. The signal is something you specifically never do inside the play.

“If we name it once, we’ve got it.” A gesture invented in the moment doesn’t work. Demonstrate it once while nothing is happening yet, so it sits in the hands and not only in the head.

What I see myself

I’m Victor, gigolo, twenty-five years in BDSM and trained as a psychotherapist. For anything where a mouth gets occupied or something happens around the throat, I agree on a stop signal, the soft versions included.

Women almost always pick the first gesture that comes to mind, usually clapping. Fine, until wrists get tied. So I talk through the position we are about to do and ask which hand or foot is still free in it. That costs half a minute and changes the chosen signal in about half the cases.

And one thing I always add: give the signal even when you’re unsure. Stopping once too early costs a break. Stopping once too late costs the evening.

What you can do yourself

• Agree on the stop signal before anything goes in your mouth. Setting it up afterward is exactly what stops working.
• Demonstrate it once and have it copied back. That is the whole rehearsal, and it takes ten seconds.
• Pick the signal on the position. Ask which hand or foot will still be free, and only then choose.
• If your signal goes unanswered, the scene is over, even if it keeps going. That is called a consent violation, and you are allowed to walk away.
• Agree on what happens after the signal: ropes off, stay lying down, talk right away or not at all. That is aftercare.

More on the stop signal

Inside this glossary, safeword holds the research behind the spoken version and the word history, and check-in covers the traffic light you use to adjust without breaking off. The play this sign is needed for most is under gag and breath control. My blog piece on the traffic-light principle shows how such an agreement lands during a date.

Beyond this site, the Dunkley and Brotto review is where the silent versions are described by name.

Where this fits on this site

If the idea of a gag or a hand on your throat draws you in, but “how do I stop this, then” holds you back, just ask that before anything is agreed. On the page about the BDSM date you can read how the signal is chosen to fit the position.

Sources

• Reglement verkeersregels en verkeerstekens 1990. Dutch government, via wetten.overheid.nl, consulted 5 August 2026. The official text of the Dutch traffic rules. It gives that article 82 paragraph 2 prescribes that hand signals are, “as far as possible”, the ones laid down in annex 2, that paragraph 3 requires drivers to obey the stop signal of school crossing guards recorded in annex 2 under number 8, that paragraph 4 and article 83 require road users to stop at a stop sign, and that annex 2 consists solely of two images with no accompanying text. Using this regulation as a parallel for a scene is my own inference. It says nothing about BDSM.
• The Role of Consent in the Context of BDSM. Cara R. Dunkley & Lori A. Brotto, Sexual Abuse 32(6), 657-678, 2020 (DOI 10.1177/1079063219842847, PMID 31010393). Literature review from the University of British Columbia, full text read. It gives the “silent safewords” for someone who is gagged: clapping the hands, snapping the fingers. Alongside that, the point that such a sign is fixed in advance, so everyone knows what it means the moment it comes.
• De auto-vallen.. Het nieuws van den dag voor Nederlandsch-Indië, 17 December 1925, volume 30, number 340, page 2, via the search service of the Koninklijke Bibliotheek. The oldest source of stopgebaar in the Dutch newspaper archive; the OCR was requested and read. It gives the sentence “Op Molenvliet Oost in de buurt van Manga Besar plots het stopgebaar van een politieman”, in a complaint about traffic traps in Batavia. On the same query the archive returned 45 articles with stopgebaar, against 8,338 with stopteken and 2,768 with stopsignaal.
• stopteken. Woordenboek der Nederlandsche Taal, via the Integrated Language Database of the Instituut voor de Nederlandse Taal. The historical standard dictionary of Dutch. It gives a mixed result: stopteeken is in it twice, as a sub-entry under STOPPEN and under TEEKEN, while the same search service gives zero hits on stopgebaar. Stoppen gives eight, as a positive control that the search works.

Related terms

The stop signal is the wordless form of the same agreement, and it belongs with anything where the voice drops out.

• Safeword. The same thing in words, with the research on who uses it.
• Check-in. Taking a reading mid-scene instead of stopping.
• Traffic-light system. The colors that go with it, and that fall away the moment you can’t talk anymore.
• Gag. The most common reason a spoken word becomes useless.
• Breath control. The play where the voice goes first.
• CNC. The form where resistance is part of the role, so the signal has to sit outside the play.
• Consent violation. What it is called when someone keeps going after your signal.
• Aftercare. What should happen the moment everything has stopped.
• Trigger. The main reason to agree on a gesture as well as a word.