One who is extremely talented in the sack. A primo compliment to any male who is either very well-endowed or not so much but knows how to make the juices flow. Pertaining to one who uses a nice cock very well.
Damn, you know my ex was such an asshole, but he was a hell of a pipelayer.
One who has mastered the art of getting layed. One who can travel to any location and still get layed with great ease! You can go as far as to say women call him up just for random sex. This man is Truely the greatest at fucking women!
"Dude she fucked you and left. Then her friends call you just for sex? You truly are a Pipelayer ."
Tucker Max(stories), Casanova, Hef, etc...