by King of Half'rs January 15, 2005
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.
by Tentochi February 11, 2005
by Jonathan and Carl January 09, 2004
A term for a skateboard ramp that looks like a U, named a half-pipe because it is essentially half of a full pipe.
by tomtom not johnjohn April 23, 2011
by halfpipeasaurus March 17, 2011
by Zach Laflair March 19, 2008
The act of laying on your back on the bed with your feet up over your head secured by the headboard so it enables you to suck your own dick.
by getfisted December 11, 2012