lay a pipe 

taking a dump, roping a growler,dropping the children off at the pool, pinching a loaf, faxing the president, building the hershey highway,dropping a log, tapping a colon, releasing the anaconda

I have to lay a pipe soooooo bad the turtle's peeping outta his shell!

lay a pipe by endoscrapy October 18, 2008

lay a pipeline 

to defecate

i'm gonna go and lay a pipeline before my bag bursts.

lay a pipeline by Dunky Oggins October 31, 2003