I'm a word nerd, so I apologize to those who aren't.
This game is similar to the Five Letter Game, but rather than the player choosing five letters for the next player's acronym, the last word of the player's sentence becomes the acronym for the next player. It sounds complicated, but I think a demonstration will clarify.
Person A: Heavy elephants literally look old.
Person B: Okay, look down.
Person C: Don't order weird neckties.
So the next acronym is neckties...