Adj. Acronym for "down for food". One who is always ready for, interested in, or desiring to eat and enjoy foods. A movement of people to oppose and counter those who are dtf or always found partying in Downtown Fullerton, CA.
An acronym for Dumb Fat Fuck. This acronym is normally used to describe someone who acts in an unintelligent and dim-witted manner. It is one who should have been fired a long time ago, but still works at the company because he knows someone high up in the ladder or is having sex with one of the bosses.
DFF was fooling around on the Internet, but one of the bosses came in, so he picked up the phone to pretend he was doing business, but then it RANG. What a DFF!