1 definition by Smellyfinger85

(verb) to bend a girl over a fish tank whilst delivering anal sex to her. Mid-motion remove the lid of the tank and repeatdley dip the girl's head in and out of the tank all the while still ramming the girl in the anus.
I got this girl round last night and fishtanked the shit out of her!!
by Smellyfinger85 July 23, 2010
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