Ahoy Marines...what's a "piss cutter"

[Donn]

It's gotta be boat related, and I'd like to hear the history of the term.

[Jim H]

A pisscutter was the dress uniform soft cover that was retired a few years ago. Sorry, don't know the history of it, I missed that class at boot camp as I was attending a Senior Drill instructor's "attitude adjustment training seminar" otherwise known as thrashing...

[htom]

Also called a "c+nt cap". IIRC the official name is "Cover, Garrison".