From the french phrase "haute couture." Unfortunately the "haute" part means "high" and the "couture" part means having to do with fashion or sewing. Ignorant Americans mixed this up and now they use "couture" to refer to high end or luxury things. So next time you walk past a bakery offering "bagel couture" feel free to call them idiots, unless they actually sew their bagels.
Those juicy couture sweatpants are high fashion. (correct)
Oh look, a store advertising bagel couture. (incorrect)