A very powerful water type move but commonly misses and angers the user.
Trainer: Blastoise use hydro pump!!!
*the move misses*
Trainer: Arghh Fucking turtle!
by omginbd May 28, 2008
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When your girls giving you head and when your about to finish, she sticks her finger in your asshole so you shoot like a fire hydrant.
Boy: "Last night I was getting head and she made me hydro pump."
Friend: "I WANT HER TO MAKE ME HYDRO PUMP!!!!"
by Jamie hell December 11, 2016
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the sexual act of taking two fists and pumping them in and out of the vagina
man jay daddy took the hydro pump like a pro
by stankyvag May 01, 2009
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