1. banjax - Noun
2. banjax - Verb
banjax (third-person singular simple present banjaxes, present participle banjaxing, simple past and past participle banjaxed)
(Britain, originally Ireland, slang) To ruin or destroy.
banjax (plural banjaxes)
(chiefly Ireland, informal) A mess or undesirable situation made as a result of incompetence.