名词

1. 轻量的；轻质的；比通常重量轻的
Something that is lightweight weighs less than most other things of the same type.

2. （拳击、柔道、赛艇等运动中的）轻量级
Lightweight is a category in some sports, such as boxing, judo, or rowing, based on the weight of the athlete.

3. 无足轻重的人；无能的人
If you describe someone as a lightweight, you are critical of them because you think that they are not very important or skilful in a particular area of activity.

1. a professional boxer who weighs between 131 and 135 pounds

2. a wrestler who weighs 139-154 pounds

3. an amateur boxer who weighs no more than 132 pounds

4. someone who is unimportant but cheeky and presumptuous

Synonym: whippersnapperjackanapes