The Collaborative International Dictionary of English v.0.48:
bitchy \bitchy\ adj. marked by or arising from malice. [slang] Syn: catty, cattish. [WordNet 1.5]WordNet (r) 3.0 (2006):
bitchy adj 1: marked by or arising from malice; "a catty remark" [syn: bitchy, catty, cattish]