As used to describe a person who acts like, well....like a Dumb Egotistical Retrograde Prick. Give 'em a hammer. They'll do the rest.
by mtnmedic January 8, 2014
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Get the derp mug.Derp is one who does something foolish or derpy. These people tend to have mad cheekbones and a lack of hair and excessive body fat.
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