What is Halfpipe?
1.
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"
2.
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?
See
