The use of urination and the plumbing motion of the male genitalia for sexual gratification during intercourse. (a)Urinating inside the female vagina during sex. (b) Pissing inside a woman's vagina immediately before penetration.
Dude Amelia was such a whore last night! I was so drunk and ended up pissing in her before banging her--Liquid Plumber bro!!!
by TeamMP February 11, 2011
1 more definition
When one takes a hard poop then immediately after the hard poop comes out diarrhea follows that poop making a "Liquid Plumber"
Yo I just took the meanest Liquid Plumber ever.
by cdaconto June 17, 2011