“She ate", “he ate”, or “they ate” is a slang phrase used to express admiration and praise for someone who has done a great job at something.
What does Ate mean?
She/he/they ate is a slang term often used in the context of fashion, music, or performance, but can be used in a variety of other contexts as well. The phrase "she ate" means doing it with style. When someone “eats” it means they’ve done something impressively.