lol. Yeah, women who do this are extremely annoying. They're so full of themselves that they think that every guy wants to sleep with them.
But this is something that is usually only reserved to young, immature women though. Usually, women don't do this after the age of about 27, although SOME will.
Best thing to do when you're getting funny vibes from a woman is to bust on her about them and accuse her of just being shy.
*I approach girl in store*
Me: Hey, what's up?
Her: (looks up with a "what do you want" look) Hi.
Me: What 'cha looking at there?
Her: (standoffish voice) Some shoes.
Me: Special occasion, huh?
Her: No, I just want some shoes (VERY standoffish voice)
Me: Nice, but you can relax. You kinda look more shy than a Mormon at a black baptist church service. You seem nice, though.
Her: Haha, oh, sorry about that, I (insert whataver stuff here).
Me: Don't worry about it, so what's your name?
*continue convo there*