He was the captain on Star Trek Next Generation. Kidding. A canard is a horizontal control and stabilizing surface mounted forward of the main wing of an aircraft. On a car the canards are the little winglets mounted on the outside corners of the front bumper cover.
I held up the Garage Vary canard to my car and snapped a quick pic.
Can't really decide if I like them... they seem to extend to the front quite a bit. I think canards look better on cars which are more 'squarish'. On a more rounded car like the Miata, the canards look a bit awkward.