A personality tick usually characterised by the uncalled for and without warning blurting of insults. Usually said with no thinking on the part of the speaker.
guy 1: Tara just totally burned me in front of everyone and i didnt even do anything to her!
guy 2: yeah, shes got a bitch complex.
girl 1: charley totally just dissed me , what did i ever do to him ?
girl 2: oh, hes just got a bitch complex