A Piece of piping which contains slices of ham, which have usually been warmed up on a radiator. The mostcommon use of a hampipe is to gain sexual pleasure.
Person 1: Bro you’re such a tool. You’re always camping and skateboarding, go to the bars with us.
Person 2: What can I say, I’m just a halfpipe hippie.
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