bottomless pit

(noun) a person that can never be full of food, a person that is always hungry

Example Sentence:

My teenage son is a bottomless pit! He never stops eating!

Ever since I started exercising I’ve become a bottomless pit. I am always hungry!

Media:

Similar idioms:

1. on second thought
2. doesn’t lift a finger
3. by leaps and bounds
4. food for thought
5. so hungry one could eat a horse
6. slop