Top Definition
1. to urinate(crude. From the expression that refers to pumping the bilge water form a ship.)

2. to vomit(crude. Less well known than sense one.)
I felt like my bladder would burst If I did not pump ship soon.
by Light Joker April 19, 2005
5 Words related to pump ship
(verb) to defecate, to crap
She went upstairs to the shithouse because she needed to pump ship
by Edna Sweetlove November 05, 2006

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