Vocabulary
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
expression
i-adjective
Example sentences
彼（かれ）は口（くち）が軽（かる）い。
He has a big mouth.
彼女（かのじょ）は口（くち）が軽（かる）い。
She is a chatterbox.