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1.
one who goes to the gym to talk rather than work out. A pump shark will continually walk up to people who he/she senses are have a good work out. The shark will then stroll up to that person and talk their ear off until they have effectively taken away the persons pump, hereby killing that persons workout for the day.
jake: Im going to get a great pump in today!! I can't wait to get to the gym and get my swoll on. You wanna go around 3?

Timmy: Man, if you want a get a good work out you better put your head phones on and stay away from that fuckin pump shark thats always there around that time.

Jake: Fuck that lets just go to the other gym so we don't run into that guy
by Nuke85 November 06, 2010