How is “watch out for” used?

In All the President's Men (1976), one line is: “You know, my girlfriend told me to watch out for you.”

Which movie is “watch out for” from?

The clip at the top of this page is from All the President's Men (1976).

to be careful of sth; to make an effort to be aware of what is happening, so that you will notice if anything bad or unusual happens

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to be careful of sth
Oxford10% de las películas
to make an effort to be aware of what is happening, so that you will notice if anything bad or unusual happens

Definiciones del Oxford Advanced Learner's Dictionary, 9.ª edición

You know, my girlfriend told me to watch out for you.

En 8 películas · n.º 1