Extremely, entirely, absolutely. The correct spelling of the word as it is used, especially in the Deep South, is plumb, not plum.

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

The reproductive system (gender neutral).

Generic term for the bars of a jail cell

an extraordinarily large set of nuts that resemble two plums swaying gingerly in a latex glove.

Seen in Half-Life 2 when one gets smacked upside the head by a flying toilet.

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