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口が軽い
kuchi ga karui◆idiom
to be indiscreet or prone to sharing secrets
彼は口が軽いから、秘密を守れないよ。
He's loose-lipped, so he can't keep secrets.
informal
To be prone to revealing confidential or personal information without discretion, often unintentionally.
彼女は口が軽いので、彼氏の秘密を友達に話してしまった。
She's indiscreet, so she ended up telling her friends her boyfriend's secrets.
口が軽い人には、重要な情報を任せられない。
You can't trust someone who's loose-lipped with important information.
This idiom is often used in casual conversations to describe someone who can't keep secrets.
Related Phrases
Pro Tip
Usage Context
This idiom is often used in informal settings to describe someone who can't keep secrets.
Gold Rule
Avoid Misuse
Do not use this idiom to describe someone who intentionally spreads rumors; it implies unintentional indiscretion.
Word Origin
The phrase combines '口' (mouth) and '軽い' (light), suggesting that the mouth is 'light' or uncontrolled, leading to careless speech.
Usage Notes
This idiom is commonly used to describe someone who accidentally reveals sensitive information, often in a lighthearted or critical way.
Word Breakdown
口
mouth
rootが
particle indicating subject
particle軽い
light or careless
adjective和英辞典