dated slang A nickname for the side cap (a foldable military cap also known as a garrison cap or flight cap) worn by members of the Unites States Navy or Marine Corps. Primarily heard in US. I asked my grandpa what the funny little hat was called in his pictures from the war, and he said it was his pisscutter. We all tucked out piss-cutters into our belts as we entered the room.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.