phrase
Armchair Quarterback
Someone who critiques decisions from a position of zero personal risk.
Origin
American football slang from the mid-20th century: the couch-bound fan who tells the actual quarterback what to do. Companion to 'Monday-morning quarterback' โ the version who second-guesses Sunday's game on Monday.
Modern usage
Used in management writing, political commentary, and any setting where outsiders criticize practitioners. A near-universal jab on Twitter.
Tags
criticism
hindsight