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Slang term for "douche bag."
I've never met a bigger shower pocket than Frank.

That must have been a big effort for you to have been such a shower pocket at the party last night.
by Wallace J. May 15, 2007
someone who is guilty of committing douche-baggery. a giant douche.
"oh wally, dont be such a shower pocket!"
"is it just me, or is jon being a real shower pocket today?"
by Frank M. April 25, 2007