look up any word, like the eiffel tower:
 
2.
The more offensive version of douchebag. Douchebags are relatively good things (keep those cunts clean), so, naturally, shower sacs would be horrible things.
Sarah: You're such a douchebag!
Val: Thanks, but you come off as a shower sac.
Sarah: Ugh! Fuckmuppet!
by Mike McShower Sac August 26, 2007
 
1.
An insult - the reversed, in terms of french/english words, version of douchebag
Shut up you showersac!
by dannytee92 May 02, 2010