flyweight

noun

1. mechanicsA weight that moves outward depending on centrifugal force.

2. martial artsA weight class in many combat sports; e.g. in professional boxing of a maximum of 112 pounds or 50.8 kilograms.

3. figurativelyadjectival useSmall, light or unimportant.

4. Weighs no more than 115 poundsperson

5. An amateur boxer who weighs no more than 112 poundsperson