Good poker sportsmanship starts with respect. If you play respectfully you won’t breach etiquette by playing out of turn, or by talking about a hand that you’re not in. If you’re respectful, you’re not berating other players after a hand because they made a low-percentage move and you ended up getting the bad end of the stick. You would realize that you want to be playing against players who make low-percentage moves. You would let weaker players stay that way, and not point out their faults to them during play.

You would also realize that poker is a gambling game and percentages are only estimations, and losing when the odds are with you is not a reason to behave negatively towards other players or dealers. You would also understand that taking extra time to show winning cards is called slow-rolling, and is only performed by the biggest of poor sports.