1. (Verb) Movement back and forth, as in to pump a shotgun or a well.
2. (Noun) A woman who is a slut.
2. (Noun) A woman who is a slut.
by Ben Neff December 31, 2007
Get the Pump mug.In rock climbing, when your muscles (especially the forearms) start to become weak and useless from fatigue.
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