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1.
someone who smokes crack in a pipe, as opposed to lacing a cigarette with it.
people who smoke primos think they are better than pipeheads, but they are still smoking crack.
by fatfreddy January 23, 2008
 
2.
Pipehead- A person who's skull is hollow and your voice can be heard from one ear through to the other.
Robert spoke into Michael's head and Jake could hear it on the other side. (PipeHead)
by Robert and Michael July 10, 2008