名詞 flyweight:

1. weighs no more than 115 pounds
2. an amateur boxer who weighs no more than 112 pounds

fly.weight

n.（名詞）
Sports
【體育運動】
A professional boxer weighing 2 pounds (approximately 5 kilograms) or less, lighter than a bantamweight.
蠅量級：一位比最輕級拳擊手還要輕的體重為2磅（約5公斤）或更少的職業(yè)拳擊運動員
A contestant in various other sports in the lightest weight class.
蠅量級拳擊選手：參加各種體育運動的最輕量級的選手
Something that is particularly small, light, or inconsequential.
無足輕重的東西：非常小、輕或不重要的東西