when you dont have a full on hard on, but you got a semi hard on.
i cant stand up right now cos i got a half pipe.
When a girl start giving a guy head but then decides to stop/leave before the guy blows his load.
She stoped giving me head before I cames and she left. All I got was a half-pipe.
When wearing pants...the fact that the zipper area curls into a curved surface resembling the formation of a halfpipe. also looks like you have an erection
"yo son, i was rocking a halfpipe during math class"
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.
noun, meaning a penis that is not fully erect, but half-way.
It was horrible when I had to walk in front of the class with a half-pipe hanging out.
A term for a skateboard ramp that looks like a U, named a half-pipe because it is essentially half of a full pipe.
How the fuck is half pipe not defined yet?
Half of a pipe that is ridden in to "get air" while doing some kind of extreme sport
Did you see the mad air I got off that half pipe Joe?