What's a prisoner's favorite game?
Hangman!
Listen here, you chucklehead. You didn't think of this, huh? It's cause you're too busy with other stuff, aren't you? So, a prisoner, they're in jail and they are about to get their neck stretched, you know? And hangman, it is a game, and someone gets hanged, you see? It's funny because of the grim wordplay.