Top Definition
When someone or something is permanently dirty even after just being clean it looks or feels dirty.
Person1: Dude, you know Billy, right?
Person2: Is that the permadirty kid with the dreads?
Person1: Yeah dude, i saw him come out of the bathroom after a shower once, He looked exactly the same, That kid is such a dirthead.
by Xin_the_face_of_warX March 04, 2006
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