There are two types of this kind of girl. Alexis can either be a sweet, kind, funny and all around amazing girl, or she can be a complete bitch that is extremely self-centered and/or annoying. The bottom line is Alexis is either a good person that you should keep around, or a nice girl.
Jared: I met an Alexis last night.
Chad: Cool! She was probably really great, did you get her number?
Jared: No, she was a bitch.
Chad: Oh... so you met that kind of Alexis.