口が軽い (くちがかるい) — having a loose tongue; being talkative; speaking without thinking; being unable to keep a secret
口が軽い
Having a loose tongue; being talkative; speaking without thinking; being unable to keep a secret
あいつは
口
が
軽
いからこのことは
言
わない
方
がいい
。
Don't tell him. He's got a loose tongue.
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