“I'm a lightweight.”

English Lesson: I'm a lightweight.

You're talking with a friend about your drinking habits. Your friend drinks almost every day, but you don't drink much at all because you get drunk easily off of just one glass of wine. You say this because you want to describe your tolerance.

I'm a lightweight.

Audio by native English speakers

a lightweight

A "lightweight" is someone who gets drunk easily.

The opposite of "a lightweight" is someone who "can hold their liquor".