halfpipe 

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"

halfpipe by hey!steve May 31, 2005

halfpipe 

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?

halfpipe by fhqwhgads May 5, 2003

Halfpipe 

What you're left with when Tony Hawk throws his skateboard at the back of your girlfriend's head while she's giving you a bj.

Not cool bro. Not only did she give me a halfpipe but my jean shorts are ruined.

Halfpipe by Max Kenwal May 26, 2012

Halfpipe Hippie 

A laidback outdoorsman whose only interest in sports & nature.

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.

Halfpipe Hippie by iTackleFatGirls April 9, 2023

Halfpipe Head

When your head is so concave that it looks like a halfpipe.

"I heard Tamika is gonna be here tonight. You know, the chick with the dented head."
"Shit is beyond dented. She's got a straight halfpipe head. I'm gonna hit a 540 Indy Nosebone off that bitch if you know what I mean."
"No."

"Brendan is dumb as fuck. Man better not come at me with that halfpipe head."
"I heard his head collects water when it rains."
"Nuh uh, really?"
"No not really you idiot."
"Aw man. I have all this salsa with no bowl. You had me excited."

Halfpipe Head by Shit heart August 13, 2021

Alaskan halfpipe 

when you shit in a condom, freeze it, and then use it as a dildo

I totally gave your mom an Alaskan halfpipe last night

Alaskan halfpipe by pitbh September 5, 2009

Carpet Halfpipe

When a man "titty-bangs" another man. In order for it to be a carpet halfpipe the reciever of the titty-bang would have to have a hairy chest. When the reciever pushes his male-breasts together it creates the halfpipe and with the hair added to it creates the halfpipe.

Justin Bieber: I cant believe that my Italian boyfriend was not down to do a carpet halfpipe.

Perez Hilton: I am sorry Justin I just got my chest hairs waxed so it wouldnt be a true carpet halfpipe

Justin Bieber: fine. but r we still down with anal

Perez: frick yeah!

Carpet Halfpipe by I love carpet halfpipes March 27, 2011