The Collaborative International Dictionary of English v.0.48:
Offish \Off"ish\, a. Shy or distant in manner; aloof; stand-offish. [Colloq. U.S.] [1913 Webster]WordNet (r) 3.0 (2006):
offish adj 1: lacking cordiality; unfriendly; "a standoffish manner" [syn: offish, standoffish]