Dime Defense
Dime replaces two linebackers with two extra defensive backs. The obvious-pass package that loads coverage.
Dime defense puts six defensive backs on the field — typically three corners and three safeties, or two corners with a hybrid 'big nickel' safety added. It replaces two linebackers with coverage bodies. It's the obvious-pass package: third-and-long, two-minute, four-minute defense.
The gain is matchup. Six DBs lets you bracket two receivers, run a heavy disguise menu, and bring exotic pressure (zero blitz, double mug) without giving up easy man-beaters. Dime is where defensive coordinators get creative — the personnel can play almost any coverage in the playbook.
The risk is the run. Dime concedes the box, so a quarterback draw or a screen against dime in a long-yardage situation can turn a 3rd-and-12 into a manageable 4th-and-2. Smart offenses script a screen or draw against dime every game, knowing the math is in their favor. Dime defenses have to be disciplined against the easy money the offense will look for.