Full House Poker

Probably the easiest achievement in the game. Go to online multiplayer, then select ranked match. It's faster if you jump into a quick game rather than try to host your own, but either will work.

Once the game's done, whether you win or lose, the achievement will pop. I don't know if quitting the game will net you this, but if you're in a rush keep going "all in" on the hands until you bust out, then you'll be out of the game, achievement in hand, in no time at all.