He walked out of the meeting with a cheese-eating grin.
Он вышел с собрания с ухмылкой, как у кота, съевшего канарейку.
Definitions
A 'cheese-eating grin' refers to a wide, often exaggerated or smug smile, similar to the expression someone might have when saying 'cheese' for a photograph. It can imply that the person is overly pleased with themselves, mischievous, or trying to hide something.
