I don't know where everyone else got there definitions for laying pipe. However laying pipe is simply fucking the hell out of a girl.

A person or people that purposefully causes chaos or mischief within a group for the sake of entertainment.

Slang for having sex

It's not even what you think it means, it's just a plumber's term. It means to lay pipe

the act of sticking your hog into a swamp donkey

Doing a great big dump that renders the toilet unusable for the next hour due to pungency.

(v) To take or the act of taking a shit. Specifically a large, cylandrical, log-like dump.