The phrase "big eater" refers to someone who consumes a lot of food.
Sentences with «big eater»
People with weight gain problems are usually not big eaters so they will need to distribute portions evenly throughout the day to prevent stomach problems. (fitnessandpower.com)
I also made some rice for my skinny big eater of a hubby to eat with his soup. (isachandra.com)
We are pretty big eaters in our family, and the younger kids usually want to eat some fruit along with the custard. (wellness-and-workouts.com)