식은 죽 먹기 (매우 쉬운 일)
Something that is very easy to do.
"Don't worry about the test — it's a piece of cake," he told her.
She finished the puzzle in ten minutes. "That was a piece of cake!" she said.
무료 회원가입으로 매일 새로운 영어 표현과 맞춤 읽기 콘텐츠를 받아보세요.