The action of making criticisms after the event(noun)
Present participle of quarterback.(verb)
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Use "quarterbacking" in a sentence
"So much of quarterbacking is mental – making right decisions about who to throw to, knowing how to evade pocket protection, etc. – that a lot of QBs take a very long time to mature, to figure out how to play the game."
"Hindsight IS 20/20, but your way-after-the-fact armchair quarterbacking is a cheap way out."
"In fact self righteous armchair quarterbacking is pretty much a Canadian news staple."