The Lexicon Of Pro Football

SCREEN—A delayed forward pass to a receiver positioned behind the line of scrimmage who has a convoy—or "screen"—of blockers escorting him.

SLOT—The area between the wide receiver and the lineman closest to him as the offense lines up.

STRONG SIDE—The side of the offense on which two or more receivers—one of them usually the tight end—line up.

TRAP—A system of blocking designed to allow a defensive lineman to penetrate across the line of scrimmage and then be hit from the side by a blocker other than the one originally stationed across from him.

TWO-MINUTE OFFENSE—A hurry-up attack featuring clockstopping passes to the sidelines and plays run off without huddling. Used by a team that's behind or tied during the final two minutes of a half The two minutes normally take 22.

TWO-MINUTE WARNING—A time-out called by the officials two minutes before the end of each half so TV networks can sell beer.

WEAK SIDE—The side of the offensive formation which has only one receiver.

DEFENSE

CHUCK—A defensive back's hit on a wide receiver. Designed to delay the receiver's release off the line or to force him to change his route, the chuck may be used just once and only within five yards of the line of scrimmage.

DOUBLE ZONE—A coverage that permits the safeties to rotate and cover either side of the held, depending on the flow of the play. Also the primary reason why the long pass is not as prevalent as it once was.