a)A player's(or his lesser counterparts) best [game], one usually brings his A game when the women are more attractive and therefore a greater challenge. Derived from the letter grade in school, "A"

b)The term can also be used for other definitions of [game]
> a)"didn't get her number?"
> "She just didn't see my A game"
> "She didn't see your B or C game either."
> b)"better bring your A game for the halo tournament"