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When a chick gets on all fours, and you tape a dildo onto the front bumper of a car and proceed to drive at her asshole at 140 mph ramming the dildo into her butthole. (warning this is dangerous and there may be injuries that possibly result in death)
Jack: I gave her such a hard BumperBumpin she flew into the next state.

Billy: At least your hoe lived.
by BumberBumpinElite April 04, 2009
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