- (Internet slang, dating, vulgar) Initialism of . (willing to engage in casual sex without necessarily seeking that in particular)
- I really want an LTR, but I'm DTF if you're hot and dumb.
- I asked if he was dtf, and he said to be over in 5 minutes.
The phrase "down to fuck' is used instead of "willing to fuck" because that abbreviation, WTF, would be confused with the phrase "what the fuck."