Top Definition
A girl who believes in abstinence. The word stands for "Afraid of Sex". She is pretty much the complete opposite of a slut.
Max: Hey girl, you want to get a hotel room?
Ashley: No way, I'm not like that.
Max: What do you mean your not like that?
Ashley: I'm not into having sex with just anybody. It takes time.
Max: Oh, I didnt know you were an AOS chick.
Ashley: What did you just call me?
by Maxwell Donald May 31, 2007
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