1. A penis, dong, or other slang for the human male reproductive organ. 2. A blow job- to fellate a man's penis like blowing on a flute or other pipe instrument.
A power pipe is an exhaust system for either a car or a motorbike, sometimes giving slightly increased performance, but mainly for showing off by making lots of noise
guy trying to sleep: Wow, my jerk of a neighbour is keeping me awake showing his friends his stupid power pipe, what an ass!