leg-breaker

A violent thug, especially one employed as an enforcer by a criminal organization (e.g., a mafia, a loan shark).

A person whose job is to break the legs of poultry in a food processing facility.

A tackle or other on-field maneuver capable of breaking a player's leg.

A demanding bicycling competition or the course on which such a competition is held.

A cricketer who bowls leg breaks.

A leg break ball.