If it's part of her broken American girl "flirting" repertoire and you think you can still get the bang, you have several options.
Ignoring it like she didn't even do anything is solid and probably my default choice.
You can playfully call her on it too ("Wow, can you tell me what charm school you went to? I've been looking for a good one for my little sister").
"Agree and amplify" works nonverbally as well--if you're on a date and a girl starts texting on her phone, for instance, take your phone out and exaggeratedly play with it with a huge sarcastic smile on your face.
Or playfully misinterpret her--for example, if she turns her back to you, turn your back as well, stand back-to-back with her, and say "yeah, I'm definitely taller".
I'm also a fan of Mystery's "There's no need to be rude, it's a social situation." It shifts the focus away from you and onto her committing a social faux pas.
Now if she's genuinely being disrespectful it's time to
punish her bad behavior. Call her out on her shitty attitude plainly and forcefully. Ruin her night so she'll think twice the next time she feels like being an entitled bitch-princess.