I could eat a horse

Meaning: おなかがペコペコである。すごくおなかが空いた。

For Example:

‣ I didn't have time to eat breakfast this morning, so I'm so hungry that I could eat a horse.

今日の朝は朝ごはん食べる時間がなかったけんもうお腹ペコペコやで。

‣ Dad, isn't dinner ready yet? I could eat a horse.

お父ちゃん晩御飯まだー？めっちゃおなかすいたで。

Synonym:

I'm starving.

I'm famish.