student asking question

What does "AF" stand for?

teacher

Native speaker’s answer

Rebecca

"AF" (or "af") is an abbreviation for "as fuck," which is an informal expression used as an intensifier in sentences. For example, the speaker says "feel old AF" in the video. This has the same meaning as "feel extremely old." You can use this in similar situations (casual only) to intensify the strength of a statement. Ex: Wow, that exam was intense AF. Ex: I'm hungry af. I haven't eaten all day.

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