Plumbing: The act of inserting frozen plums into one's anus

Plumber: inserting into someone else's anus

Plummed: to be in receipt of plum insertion

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.

The reproductive system (gender neutral).

Generic term for the bars of a jail cell

Wearing one's pants so low as to display one's asscrack. Derived from the state of many a fat plumber's pants.

The act of purposefully stopping up your toilet so that the plumber will come to your house and unclog it.

(verb) Very deep anal penetration
Deep-sea plumbing: Anal penetration over 10 inches