One who weighs less than the average.

体重不及平均重量之人。

A person lacking in strength of character or intellectual depth.

无个性的人；肤浅的人。

A boxer in a weight division having a maximum limit of 135 pounds for professional and 132 pounds for amateurs.

(拳击、摔角)轻量级选手。

Below average in weight.

不及平均重量的。

Of little account.

不重要的。

Lacking in seriousness or profundity; not to be taken seriously.

欠严肃的；肤浅的；轻松的。