Designated ugly fat friend. When a group of girls go out and they take a fat friend with them so they look better.
me and the guys went out last weekend and Ben ended up with the duffy
by mischa January 16, 2005
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describes a buttocks, bum, or butt
Look at Sean's duffy! What a hottie.
by SeanDuffy March 23, 2014
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My homeboy wanted to know if my bitch has any duffy's he can fuck. She hooked him up with her designated ugly fat friend.
by doja303 October 26, 2017
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a person who finds it particularly hard to get an erection and ends up rubbing cream on the end of his forskin toget aroused
that guyover there needs to duffy to get a boner
by frufru January 22, 2004
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When someone befriends the handicapped solely based on the fact that they have a disability. The Duffy Effect involves a person who does not take into consideration that their new handicapped friend may actually be undeserving of friendship.
Katie: "I've always been nice to Ryan, but now he asked me to prom!"

Drew: "The handicapped kid? This is a textbook example of The Duffy Effect! That kid is an asshole anyway."
by Lafferty Daniel August 7, 2008
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The Double Duffy is used in staff meetings when frustration mounts to the point that you cannot take it anymore. It is usually directed at the person running the meeting, but can also be directed at colleagues. This will usually either end the meeting or move it right along. The double Duffy consists of two middle fingers being directed from the same person.
Can you believe what the boss was griping about in that meeting? I wanted to give him a double Duffy.
by Artteacherman May 25, 2017
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