Pay to use. Something that you won't be able to use unless you pay first. Used in the art community in reference to specific bases, stamps or skins.

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.

Put to use

“Pound Town University”

“One who is going to have hard intercourse”

Or

“One who is going to Be drinking heavily“

The act of sex. To Plug That Up.