More fondly refered to as "derf" or "derf-derf" he is the most idiotic and worthless kid in my psych class. He laughs at everything you say to him which more often than not is an insult, usually referring to his step-mom who has fake titays.
hey derf, you ever see your moms fake boobs? cause you are worthless like that
by Jeff January 31, 2005
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another way to say the word "duh" almost like obviously
Person 1: Wait why are we going to the mall?
Person 2: To go shopping, derf!!!
by yeah3xyeah3xyeah3x March 11, 2011
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One stupid ass fucked up bitch, who doesnt know what she wants, lies all the time, tells you she likes you... but then sometimes wants to get on other people...
Man... she is such a Derf!
by Derf Hater March 10, 2003
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When one of your friends attempts to become the incredible hulk when drunk and no one will give them more alcohol.
Fred went derf smash on the table and broke it after everyone hid the alcohol from his drunk ass.
by Steve_42 January 22, 2009
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an expression which has recently spread through out the Vancouver area, which means to sniff some cocaine.
fuck man, last night i snerfed way to much derf.

I just picked up and 8 ball. get ready to snerf derf!
by rapies1991 June 13, 2011
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The act of 2 buck naked men in a horny frenzy come together taint to taint and mash them together until the sweat mixes with ass juice forming a burnt buttery looking substance that smells of Axe body spray, Ball sweat and Shit!
By the smell of him, I'd swear he was out making Derf Batter last night!
by Krumpet Puncher September 01, 2015
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