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1.
The short piece of exhaust pipe sticking out the back of a vehicle. Commonly found on some economy versions such as the V6 Mustang. The dick pipe is just a single pipe sticking out the back at a curved downward angle and a beveled cut at the end.
I need to get a new exhaust system for my ride. I'm looking at a true dual exhaust to replace that ugly dick pipe setup.
by Bruce-GumChewz January 17, 2011
 
2.
(v) To have sexual intercourse.
"So I took her into the porta-shitter and dickpiped the fuck outta her."
by Norsic September 21, 2007