trout noun an unattractive (older or old) woman UK,1897
Labour MPs are campaigning, sad to report, to prevent a statue of the old trout [Margaret Thatcher] ever being erected at Westminster. — TheGuardian, 29 January 2002
▷ see: THAMES TROUT ▶ all about trout alert, watchful UK,1962 Noted by Robin Cook, 1962.