n. 25B6; noun
my aircraft had been damaged by flak : ANTI-AIRCRAFT FIRE, shelling, gunfire; bombardment, barrage, salvo, volley.
(informal) he has come in for a lot of flak : CRITICISM, censure, disapproval, disapprobation, hostility, complaints; opprobrium, obloquy, calumny, vilification, abuse, brickbats; Brit. informal stick, verbal; formal castigation, excoriation, calumniation.