at its best

at best

1. In the best possible scenario. At best, Doug will be only an hour late. They're only selling junk at the yard sale, so I think they'll make $10 at best.
2. Ideally suited for success. In this usage, a pronoun is used between "at" and "best." I'm not at my best when I'm tired.

at its best

Of or at the highest standard of quality possible. You'll love their new album; it's simply jazz at its best.
References in periodicals archive ?
Black corn truffle tamales, lobster enchiladas blanketed with pumpkinseed sauce, pickled ancho chiles stuffed with foie gras...This is hybrid cuisine at its best. Presidente Masaryk 513, Colonia Polanco.