I covered "banjax(ed)" in some detail in a post last year, FWIW:
stancarey.wordpress.com/2024/03/15/b...
Banjaxed and bockety words in Ireland
‘Lucky might get going all of a sudden. Then we’d be banjaxed.’ (Samuel Beckett, Waiting for Godot) Banjaxed and bockety are a fun pair of words in the Irish English vernacular. Banjaxed I heard fr…