A term used to pre-warn colleagues of a toilet which you have just had a monster shit in, so that fellow colleagues do not make the mistake of making a visit to the same trap within the "cooldown" period.

Traps are numbered from 1 onwards, from left to right as you face the cubicle.

when you've done something so cringe you can't stop replaying it in your head and it stops you from getting on with your every day life