When a Man (through much effort) inserts his flaccid penis, folded in half, inside a womans ass. Then allows it to get "Hard" while slowly unfolding into a Springing Action.
"Hey baby, your gonna feel a slight pressure."

"ok, you going for the Spring Board?"

"Yup, its in, now gimme dem boobies."
by backfromiraq January 10, 2012
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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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Rhyming slang for "supreme court".
This is the way it sounds when Americans say "supreme court" in TV interviews.
Will has criticized Bush's selection this week of Harriet Miers to sit on the spring board. Bush didn't mention the controversy her nomination has created in Republican circles.
by Dan October 6, 2005
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