DFF

"Don't Forget to Flush". Used in online chat or instant messages whenever someone says brb.
teemo1: i just polished off my 10th rum n coke. brb

screemo2: yeah, dff
by teemo1 September 07, 2010
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dff

designated fat friend
1) someone who hangs out with someone else that is much larger then there self
2) someone who is fat and hangs out with skinny people
3) when a skinny girl hangs out with a fat girl to make her look better
hey did you see that dff?
yeah holy shit that bitch was huge but her friend was cute
by Dj slander aka gh0std0g November 15, 2005
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DFF

(Diff)
"Dance floor fingering." The act of fingering a girl on the dance floor in a clandestine manner so as to mask the sexual act amidst the bumping and grinding.
Dude, she was sexy and we were dancin for the longest...I just had to DFF her!"
by Anonymous DFFee July 13, 2006
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dff

Drink Fight Fuck
also a well known crew in west yorkshire/york and stoke
all meet in leeds
and are known as the trainstation kids
person1: are you dff?
dff member: nope
by blanchy stuart July 17, 2006
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DFF

This is means Destined For Fatness. It is a thin girl who will eventually become fat. The idea is that as the saying goes, when you marry a woman, look at her mom and that's what she'll look like when she gets older. This can also be loosely used to classify a girl that over eats, doe not exercise or does unhealthy things. You can either use DFF or D4 which is a thin girl that will eventually explode into a fatty.
She may look ok now, but she's DFF!
by The Almighty P.Gotti February 01, 2011
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dff

Drink Fight Fuck

A Leeds based crew who do all of the above
Dff Lets go Drink, FIght and Fuck
by DFF July 18, 2006
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dff

Dead fish fuck. When a girl doesn't feel like getting it on, but her loverboy wants to anyway.. He humps her as she lays there like a dead fish
'Dude, did you get any last night?'

'Yeah, just a dff'

'Hahahahaha... ..me too'
by Tomashtom September 08, 2007
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