1 definition by Atom TwoThousand

A man who is about to receive a blow job in a dark room, tucks his erect penis in his thighs. When the woman goes down to look for the penis, the man released his erect penis from his thighs and it springs up thumping her in the face.
The spring board is one of the most effective ways to leave a mushroom stamp on your girlfriend.
by Atom TwoThousand April 2, 2011
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