MAC Cockiness is a very warm-toned, dark copper with a frost finish. It is a limited edition eyeliner and contains 0.06 oz.
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MAC Cockiness Superslick Eyeliner ($20.50 for 0.06 fl. oz.) is described as a "shimmery rose gold [with a Frost finish]." It's more like a brightened, medium copper with barely-there pink, gold, and copper shimmer. I tried to look at it several different lighting situations to see if it turned more rose gold, but it always looked rather coppery. It had mostly opaque color coverage and seemed quite pigmented in a single stroke. There are actually not that bad coppery eyeliners--this post compares a few here but none really compare favorably. MAC Rich Ground (P, $16.00) is much darker and browner. Giorgio Armani Copper (05) is lighter. See comparison swatches.
Looking for something similar or to see what you have in your stash? Here are some of the top dupes for this product!