eat lunch

eat (one's) lunch

slang To defeat one. I've been practicing really hard because I refuse to let my nemesis eat my lunch again.See also: eat, lunch

eat someone's lunch

Sl. to best someone; to defeat, outwit, or win against someone. (Like a school bully taking away children's lunches and eating them.) The upstart ABC Computer Company is eating IBM's lunch.See also: eat, lunch