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n. Abbr. QB Football
The offensive backfield player whose position is behind the line of scrimmage and who usually calls the signals for the plays and receives the ball when snapped.
v. quar·ter·backed, quar·ter·back·ing, quar·ter·backs
1. Football To direct the offense of.
2. Slang To lead or direct the operations of: "needed someone to quarterback the [brain trust] for the first U.S. ICBM program" (Forbes).
To play quarterback.
Monday-morning quarterbacking wisdom after the event, esp by spectators