a messy/noisy eater 吃得一片狼藉的人/吃饭声响大的人
a healthy/big/hearty eater (=someone who eats a lot) He’ s small, but he’ s a healthy eater. 食量大的人
a picky eater (=someone who does not like many foods) They have a four-year-old child who is a very picky eater. 挑食的人
a meat eater 食肉者