Definify.com

Webster 1913 Edition

Noun.

Same as

bish ‎(plural bishes)

(slang) Bitch (as a term of abuse).
(Britain, slang, dated) A mistake.
- 1952, Anthony Buckeridge, Jennings and Darbishire, London; Glasgow : Collins, page 64:
  "You — you don't mean you've made a bish of it?" [said Darbishire]
- 1951, Anthony Buckeridge, Jennings Follows a Clue, ISBN 0-7551-1366-7, page 41:
  What on earth was the matter with him? He never made bishes like this during PT!

bish