IPA: //ˈkrækˌbæk//
KK: /ˈkrækˌbæk/
Referring to a type of block in football where a player, usually positioned on the outside, moves back towards the center to block an opponent after the ball is snapped.
The team executed a crackback block to protect their quarterback during the play.
A type of block in football where a player unexpectedly hits a defender from the side or behind, usually to help a teammate advance the ball.
The wide receiver executed a perfect crackback to protect the quarterback.
Crackback is a compound word formed from "crack" (from Old English *cracian*, meaning to break) and "back" (from Old English *bæc*, meaning the rear or back side). The term refers to a specific type of play in football where a player receives the ball and then runs back towards the line of scrimmage, often involving a breaking or sudden movement.
Think of 'breaking' ('crack') and moving towards the 'back' — that's how a crackback play works in football.