A sex act involving a group of dry masturbating gentlemen and or gentleladies where upon the completion of climax fist bumps between group members abound.
Kevin, Connor, Matt and Isak, sampling a fine sherry, did the raw bumper into the night. In the morning, their hands and fists were equally tired.
by DoubleDutchRudder May 19, 2018
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Person B: If you can achieve that bumper badge, turn off the bumpers!
Person B: If you can achieve that bumper badge, turn off the bumpers!
by ChameleonDragon May 27, 2019
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