Top Definition
A facial expression reminiscent of one who is retarded. It often involves eyes turned in different directions and a stupid smile.
In reply to that idiotic comment, I posted a picture of a retarded facial expression with the caption "This is my derp face."
#derp #retard #herpderp #idiot #fail
by Banky Edwards February 09, 2011
When a persons expression of his/her face or reaction is considered derping, hence the word "derpface"
Jan: Guess who just got laid?!?
Joe:*makes a derpface, i dont know, you?
Jan: knock off the derpface! your creeping me out!
#derp #derp-face #stupid #silly #obnoxious #herp #derp-da-derp
by B.H from SPHS October 16, 2011
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