The phrase "ate like a bird" is often used to describe someone who eats very little, but what is the opposite of that? One antonym for "ate like a bird" would be "devoured like a beast," suggesting someone who eats a lot of food very quickly. Another antonym might be "ate heartily," indicating a person who ate a satisfying amount of food, without overindulging. Alternatively, "ate conservatively" would refer to someone who ate only what they needed, without wasting food or overeating. Overall, there are several antonyms for "ate like a bird," each indicating a different way of eating.