饭桶 (fàntǒng): rice bucket (for serving rice)

Measure Word

一个饭桶 gè

你这个饭桶，什么事都做不好！

Nǐ zhège fàntǒng, shénme shì dōu zuò bùhǎo!

You good-for-nothing, you can't do anything right!

memory

饭 = rice/food, 桶 = bucket. A 'rice bucket' is someone who's only good at eating — all they do is consume food without contributing anything useful.

register

Mildly insulting when used figuratively. Less harsh than some insults but still rude — don't use it casually with strangers.

饭 fàn

桶 tǒng