When a girl start giving a guy head but then decides to stop/leave before the guy blows his load.
She stopedgiving me head before I cames and she left. All I got was a half-pipe.
By Martguerita
Half-pipe
This is the origin of the word as far as I know. Two opposing ramps originally used for BMXers, but now used by snow boarders, roller bladers, skateboards and others. See also quarter pipe.
I heard they're building a new half-pipe down at the park this summer. Let's try it out but I'm not down with wearing all of the armor they are going to require.
In a three-way with two chicks a dude uses his tongue to fill the second hole while lying on his back. The two females must be facing each other and enjoying themselves.