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1.
Means generally the same as imperfect, just spelled incorrectly, thus furthering the meaning of the word. If used correctly, it could be used as and extremely awesome myspace name i.e.: PaigeUnperfect™
Girl 1) She's such an unperfect whore, I can't believe he's dating her.
Girl 2) Do you mean imperfect?
Girl 1) No, unperfect suits her more. *glare*
by Call Me Pookie September 07, 2008
 
2.
something that is not perfect.
This drawing is unperfect.
by loveerrr June 11, 2008