Glass Jaw

Slang for the confusing number of sanctioning bodies (WBA, WBC, IBF, WBO, etc.) that each crown their own "world champion."

A fighter who relies on aggression, power, and durability rather than technical skill. Brawlers come forward and trade punches at close range.

Slang for a fighter's ability to absorb punches without being knocked out. "He has a great chin" means the fighter is durable.

A knockdown where the fighter is not badly hurt and rises immediately. Usually caused by being off-balance when hit rather than by concussive force.

A skilled fighter who is competitive but not quite at world-class level. They act as a "gate" - if a prospect beats them, they prove they belong at the top level.

A wild, looping, maximum-power punch thrown with little regard for technique or defense. High risk, high reward - often telegraphed and easy to counter.