"Poopsocking" is when a gamer is so engrossed in their game, they won't stop playing for any reason, even to go to the bathroom — so they'll poop in a sock. It's not the only manifestation of this kind of behavior (a common variant is a gamer who drinks a lot of soda and then pees in the cans, and the term "catassing" derives from a player whose house stinks because they've neglected basic chores like cleaning their cat's litter box), but the principle is the same — a gamer plays so long that it starts negatively affecting their quality of life. Therefore, Anti Poop-Socking is when a game has a built-in function that rewards the player for taking a break from the game... or at least encourages them to.