Designated Ugly Fat Friend

One who accompanies two other girls to make them look better. Usually, without their own knowledge.
There were two pretty girls accompanied by an uglier, fatter girl. The other girl was a DUFF, only there to make the other girls look better.
by wolfles July 9, 2015
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A Scandinavian drinking game that can be played by two or more players.

Played in a circle the participants hit a beer can against their head twice with considerable impact (hence duff duff) and then pass the same beer can to their left. The next participant does the same and that continues until the can springs a leak.

The person whose head caused the leak then needs to open the can and down it.

The player to the loser's left takes a fresh can and the game continues.
This drinking game should only be played by skilled experts.

Duff Duff is often played at men only events such as but not limited to: camping trips, bucks parties and festivals.
by Gazcap January 25, 2012
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the Designated, Ugly, Fat, Friend. Everyone has one in their group of friends. shes the easiest person to talk to in the group, shes the one to go to when a guy needs to find out where the fit girl in the squad likes to eat out at.
by Trafford112 April 11, 2015
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"this is not a drill message" -- implying the following messages are not simulation or exercise related message but of vital and usually life/death importance
"Charlie one five, Zulu four zero, no duff message, Zimmerman is down, Zimmerman is down"

"Zulu four zero, charlie one five, medic on the way"
by Shizuma April 16, 2008
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to throw a severe beating to another person or group. Used with mal intent or to beat the ass's of.
"If you don't shut the fuck up, i'm gunna duff your dumb ass"
by DamionFK December 2, 2006
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