butt plumber

A male who engages in the practice of inserting his penis into the anal cavity of another of the same sex.

When your making out with a girl you throw her on the ground and ram a plunger into her ass

when a man bends over and his butt crack hangs out

a fat squished butt crack shown when someone is bent over or sitting down with their shirt a little over the area

Whenever you see a man or woman, (typically a man in his round weight probably like 200's), who deny too wear belts in public, their pants ever so gently slip down to reveal their ass crack. This is commonly referred to plumbers, who have it happen naturally whilst working on pipes. Its a mystery how their booties keep escaping the fiber confinement that is jeans.