입이 귀에 걸렸어요 · 입이 귀에 걸려서 (…)
to grin from ear to ear, to be all smiles (lit. the mouth is hooked on the ears)
Example
합격 소식을 듣고 동생 입이 귀에 걸렸어요.
When my younger brother heard he'd passed, he grinned from ear to ear.
Word parts
The smile is so wide that the corners of the mouth seem to hang on (걸리다) the ears.
Good to know
Casual and humorous; usually in the past form 걸렸어요 to describe someone visibly delighted.
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