Top Definition
The act of derping in the middle of an important conversation where info is crucial or dealing with something along the lines of personal emotions.

Uncalled derping in the classroom during a test, business meetings, interviews, orgainization, or with someone who is really hurting emotionally and needs you to be serious.
Person 1: I was talking to Amanda the other day about my grandma dying and she dirty derped me...
Person 2: WTF...she did? Thats harsh bro there is a time and place for everything, but to be Dirty Derpin at that time...
Person 1: Yea we were just sitting there talkin and all of a sudden derps...I mean its cool and funny, but that was uncalled for.
di cleadmau5 07 settembre 2011

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