What does "fancy" mean in "I think you are fancy"?

What is the context of the sentence? The word "fancy" can have several different meanings, depending on usage.

Andy is right of course, it could mean several different things depending on circumstance

You're overdressed
You charge too much
You imagine yourself impressive, important, or clever
I don't believe that you actually exist

Generally, when someone says someone else is fancy, they are speaking about how that person dresses, or how they wear their hair, the complete package. It can be an insult or a compliment, depending on the fancy persons fashion or style.
A 'flight of fancy' would mean a person has imaginative thoughts.
Neither superficial or down-to-earth would apply, because these terms are usually about their personality, more than the wrapping.
As an aside, a fancy woman in Ireland is generally a kept woman, or the woman a married man is having an affair with. But in Canada, If I called someone here fancy it would either mean a woman is in a beautiful dress, or more likely a little girl or boy who dressed up for a big event. Or as in most cases, like, say a homeless person or slob or a friend who normally doesn't anything but jeans and tee shirt gets gussied up, if one of them was wearing a tiara, I'd would say they look fancy.

Hope that makes sense.

It sounded like Izzy's description of cricket, Ceili, but in this case I understood perfectly.