Definitions by Skip321
ambush
The act of taking a crap, finishing the roll of toilet paper, and neglecting to replace the empty roll with a new supply. This sets the stage for the next unsuspecting individual to sit down and pass a bowel movement not realizing there isn’t a square-to-spare (i.e. square of toilet paper, from Seinfeld). The ambush can easily be prevented by keeping a spare roll of toilet paper under the sink provided the dumb ass who is saved by the spare replaces it.