Smart Casual?

Just made reservations at a restaurant and they told me the dress code is 'Smart Casual', uhmmmmm whats that? Thats a first for me!

Is it just a dressed up pair of jeans and a cute top?

this is what wikipedia says:

It has been suggested that smart casual for men consists of dress trousers—some, but not all definitions may allow jeans or chinos[2]—a long-sleeve dress shirt[3] (tie optional), leather loafers or dressy slip-ons, dress socks, a belt, and, if appropriate, a sport coat. For women, it consists of slacks or a skirt (long or short), a blouse or turtleneck, a fashionable belt, a jacket, a vest, or a sweater coordinated to the outfit, hosiery or socks with boots, flats (leather, suede, or fabric) or mid-heel shoes. Not all definitions allow jeans. Women may also wear jewelry, such as earrings that complement their overall outfit, at least. This category demands a pulled-together, harmonious, complete look with colors, fabrics, shoes, and accessories, for both men and women. [4]

Formality is subjective, and in some places, the above would describe 'casual', with smart casual requiring a jacket and tie.