口が重い

口が重い (くちがおもい) means to be reserved and not talkative.

Kana

くちがおもい

Meaning

to be reserved and not talkative

Japanese Example

彼は口が重い人だ。

Translation

He is a quiet and reserved person.

Related idioms

みみにはさむ

to happen to hear something

目から鱗が落ちる

めからうろこがおちる

to have one’s eyes opened

to have trouble dealing with something

あしがでる

to go over budget