Definition from Wiktionary, the free dictionary
crackback (plural crackbacks)
- (American football) A block in which the blocker, positioned wide, blocks back towards where the ball was snapped.
2007 January 3, The Associated Press, “Saban Needs More Time to Mull Alabama Offer”, in New York Times:
- Mike Pereira, the league’s director of officiating, said Wade did not commit an illegal crackback block because he was blocking upfield and not back toward the ball.