Example Sentences:

Ramayana:  Ravana had lost the habit of taking flak from others because for a long time whoever had dared oppose him had been summarily executed and people had stopped criticising him.

Mahabharata:  Although Yudhisthira had gambled only because of his obedience to his elders, he still took a lot of flak for all that happened during the gambling match.

Bhagavad-gita:  Those who aspire to grow spiritually have to be ready to take flak from those who live materialistically and reject spirituality as an illusion.