n. (also flack) 1 anti-aircraft fire. 2 adverse criticism; abuse. flak jacket a protective jacket of heavy camouflage fabric reinforced with metal, worn by soldiers etc.
[ abbr. of G Fliegerabwehrkanone, lit. aviator-defence-gun ]
FLAK
Meaning of FLAK in English
Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012