超重 (chāo zhòng) means “overweight”

More examples

在机场被收取了超重费。zài jī chǎng bèi shōu qǔ le chāo zhòng fèi

I was charged an excess baggage fee at the airport.

A person, bag, or shipment crosses the weight limit set by a rule or scale.

太重tài zhòng: Being so heavy that the weight feels difficult to handle.
过重guò zhòng: Being heavier or more burdensome than a reasonable level.

用于表示超过允许重量限度的状态，可作形容词用于人、行李或货物。yòng yú biǎo shì chāo guò yún xǔ zhòng liàng xiàn dù de zhuàng tài kě zuò xíng róng cí yòng yú rén xíng lǐ huò huò wù

超 (chāo, "go beyond") combines with 重 (zhòng, "heavy") to describe something whose weight goes past the accepted boundary.

In travel Chinese, this word focuses on a measured limit, so it fits luggage and cargo when a scale or carrier rule is involved.