Top definition
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
Get the mug
Get a The Spring Board mug for your dad Paul.