student asking question

What does "up" in this context mean? I don't think it literally refers to a direction.

teacher

Native speaker’s answer

Rebecca

That's correct! "Up" in this context does not refer to the direction. Here the phrasal verb "eat up" is used, which means to eat all of something. Ex: Eat up! We're going to be late for work. Ex: Once you've eaten up your broccoli, we can have some ice cream.

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