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Similar to the origin word "Derp" it is the definition of a person who is constantly being a Captain Obvious, saying things that don't make sense, or they fail and are non-sense and they have no idea what they are doing half the time and you get the point.
Teacher: Spell "Night"

Derple: N-I-T-E

Student: Dah! Your such a Derple!
by HunterKill November 27, 2011
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