have someone for breakfast

have (someone or something) for breakfast

To defeat, complete, or handle someone or something easily. Often used as part of a boast. He can challenge me all he wants—I'm not worried! I have chumps like him for breakfast! If anyone can write a term paper in one night, it's Rich—he has assignments like that for breakfast!
See also: breakfast, have
Farlex Dictionary of Idioms.

have someone for breakfast

or

eat someone for breakfast

INFORMAL
If you say that one person will have another person for breakfast or eat them for breakfast, you mean that the first person is much stronger and more aggressive than the second. He thinks he's tough, but Jane Wooton will have him for breakfast. He was a kid thrown into a town where the miners could have eaten him for breakfast.
See also: breakfast, have, someone
Collins COBUILD Idioms Dictionary, 3rd ed.

have someone for breakfast

deal with or defeat someone with contemptuous ease. informal
See also: breakfast, have, someone
Farlex Partner Idioms Dictionary
See also:
  • have (someone or something) for breakfast
  • have for breakfast
  • eat (something or someone) for breakfast
  • (one) will have (someone or something) for breakfast
  • will eat for breakfast
  • (one) will eat (someone or something) for breakfast
  • brag
  • brag about
  • brag about (someone or something)
  • get a handle on something, to