bish /bɪʃ/ noun4 •(UK, slang) A bishop.'It's all right, bish,' said Augustine. 'All—all right?' faltered the bishop. — 1927 •(slang, old-fashioned) A mistake.What on earth was the matter with him? He never made bishes like this during PT! — 1951 •(slang) A minced oath (as a term of abuse). •Synonym of bikh. formsbishes