Wiktionary
n. A device that deactivates an electrical circuit under certain conditions, often for safety reasons
Wikipedia
"Trip Switch" is a song by British alternative rock band Nothing But Thieves. It was produced by Julian Emery and was released as a single from the band's self-titled album on 18 June 2015. It topped the Billboard Alternative Songs chart in 2016.
Usage examples of "trip switch".
She swallowed rapidly, ducked her head, then plunged on as his fingers touched the trip switch of the phone.
To activate the camera, Steve pressed against the side of his head, where a trip switch was embedded beneath the plastiskin that had been built around his once-shattered eye socket.
The nice thing about the flame foam was that it hardened on contact with air, but the not-so-nice thing about flame foam was that the trip switch was connected to the magna strip.