eat someone for breakfast
US /iːt ˈsʌm.wʌn fɔːr ˈbrek.fəst/
UK /iːt ˈsʌm.wʌn fɔːr ˈbrek.fəst/

1.
朝飯前だ, 簡単に打ち負かす
to easily defeat or overcome someone, especially in a competition or argument
:
•
Our team is so strong, we're going to eat them for breakfast in the championship.
うちのチームはとても強いから、チャンピオンシップでは彼らを朝飯前だ。
•
Don't worry about the interview; you'll eat him for breakfast.
面接のことは心配しないで、あなたは彼を朝飯前だ。