flaek
noun
1. antiaircraft fire, esp. the bursting shells of such fire.
“Now they were greeted by a few bursts of fire, but no heavy flak came at them.” (Rutherford George Montgomery, A Yankee Flier Over Berlin)
2. (informal) irritating opposition, criticism, or dissent.
He received a lot of flak at work for his appearance on a reality show.
Word History: The word “flak” is a much-shortened form of the German word “flugabwehrkanone,” which means “antiaircraft gun.”