<p>Some more football jargon:</p>
<p>ON OFFENSE:</p>
<p>Option - Where the QB runs with the ball, but also has a RB running just alongside him in order to give him the "option" of tossing the ball to the RB</p>
<p>Flea flicker - Deceptive play where the QB hands off to the RB, only to have the RB toss it back to him way behind the line of scrimmage; a variant of the playaction</p>
<p>RB pass - Self-explanatory; deceptive play where the RB gets the ball, pretends to run with it, but pulls up short of the line of scrimmage and throws the ball</p>
<p>Half-back/Tail-back More specific names for RB's</p>
<p>Fullback - A type of RB that is bigger and more suited for blocking for the HB/TB than for running</p>
<p>Reverse - Deceptive play where a ball carrier hands off the ball to another carrier who is running in the opposite direction; fake reverses are also common, as the ball is hard to keep track of</p>
<p>Possession Receiver - A receiver who can get many YAC after short throws (yards after catch), e.g. Terrell Owens</p>
<p>Deep Threat - A receiver who tends to do the most damage with deep throws, e.g. Randy Moss and Marvin Harrison</p>
<p>ON DEFENSE:</p>
<p>Shut-down Corner - A cornerback who can single-handedly neutralize the threat of the opponent's top receiver</p>
<p>Jam - When the corners try and physically impede the receivers' routes (for the first 5 yards)</p>
<p>ROLES</p>
<p>ON OFFENCE:</p>
<p>Quarterback - Takes the snap, throws ball, hands ball off to RB</p>
<p>Running back - Takes handoff and runs, occasionally receives passes, blocks blitzing defenders when necessary</p>
<p>Fullback - A lead blocker for the RB, sometimes is called upon to run in short yard situations</p>
<p>Wide receiver - Receives passes, blocks cornerbacks on running plays</p>
<p>Tight end - A big and slow receiver (or a lineman with good hands) who lines up on the one end of the line, acts as a hybrid between a lineman and a receiver</p>
<p>Offensive tackles - Outermost lineman (except for the tight end) on the offensive line and is generally regarded as the most important lineman</p>
<p>Guards - Linemen who line up inside the tackles</p>
<p>Center - The lineman who snaps the ball to the QB</p>
<p>ON DEFENCE</p>
<p>Cornerback - Defends receivers</p>
<p>Free safety - The faster of the two safeties, usually assigned to help out the cornerbacks on deep throws</p>
<p>Strong safety - The stronger of the two safeties, usually plays like a linebacker, closer to the line of scrimmage</p>
<p>Linebacker - Defenders who line up behind the defensive line, usually assigned to stopping the run, but are also called upon to defend on short yard passes; generally regarded as the most important defenders, and the Middle Linebacker is like the QB of defense</p>
<p>Defensive ends - Defensive linemen who line up on the outermost edges; usually are the leanest, smallest, and fastest of the linemen </p>
<p>Defensive tackles - Defensive linemen who line up inside the D-ends</p>
<p>Nose guard - Defensive lineman who lines up directly against the center (in a four-linemen defense, there is no nose guard)</p>