1.
big eater; glutton; hearty eater
A person who eats a large amount of food. The final character 漢 means "man," so the word originally referred to men, but it is now used loosely for anyone who eats a lot.
Written 大 (big) + 食 (eat) + 漢 (man). A somewhat literary or descriptive word, often used admiringly or humorously.