Let's go and get a bite to eat.

出去吃点什么吧。

I've lost my appetite.

我没食欲了。

That good smell coming from the food stand is making me hungry.

从小饭店飘出饭菜的香味让我感觉饿了。

I'm starving.

我快饿死了。

I am so hungry I could eat a horse.

我太饿了。

That cake really looks inviting¹.

蛋糕太诱人了。

I have a good appetite.

我食欲很好（胃口好）。

I want to grab a bite to eat.

我想吃点儿什么。

My stomach is growling².

我的胃正在咕咕地叫。

Tonight I'm going to eat well.

今天晚上我应该好好吃一顿。

Slow down. Or you will get indigestion.

慢慢吃，否则你会消化不良的。