See also Bum Crack and Plumber. In general, when you have a water leak and you call a plumber to check it out, they always show up, bend over and a portion of their crack can be seen above their beltline.

when someone wearing a uniform (in this case a plumber) bends over and his ass crack sticks out.

the but crack that is visible when one is either crouching or sitting resembling a plumber fixing a toilet. Usually causes one to be grossed out unless your into that kind of stuff.

A group of superior individuals that make up the team Krakow Plumbers Crack in Goallineblitz..known for their witty remarks in league forums and dotball dominance

just another variant of many other "sucks......" insults when bagging out something.

when your ass crack is really high on your back

A plumber's crack usually all the way up they're back. Usually their name would be Sarah. Plumbs sewage and enjoys it.