Abbreviation for "down to fuck"

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.

Down to forgive

Down to f***?, a booty call.

down to fuck

trying to hook up, and/or have sex.

means: Down To Fuck

used in superbad