What is Poswa?
1.
Acronym. Pronounced "pause-wah". Means: Piece Of Shit, Walk Away.
You "call POSWA" on something when you're finally giving up on it because it's just not worth solving/fixing/dealing-with.
Sometimes it's used as the whole phrase instead of the acronym.
Source: Comedian Bill "the Man" Hicks.
"Dude, you've been beating your head against that broken computer for hours now. It's never going to work. Call POSWA on the damn thing and let's go."
See