To sexually penetrate a woman vaginally, orally and anally in the same night. Attributed to an (apocryphal) remark made by John F. Kennedy that "You truly haven't had a woman until you have had her in all three holes".
In communities where small waste pipes in dwellings predominate, the Big Pipe is the public lavvy that will take any rectal punishment that can be thrown at it without fear of clogging up.
The bog at my place won't be able to handle my curry load tonight; I better get down to the BigPipe before a queue forms.