A small pressure-triggered grenade, about the size of an AA battery. Can be hidden in foods like bread or soft fruits, which is why you NEVER eat in hostileterritory.
Neil foolishly bit into the apple the shady stranger gave him, and a small explosion blew off the bottom of his face. A griswald was hidden in the apple.
A large and complicated knot. Taken from National Lampoon's Christmas Vacation when the main character, Clark Griswald, passed off a string of lights in a basketball sized knot to his son. It's most commonly seen made of electrical cords from game consoles and computer systems.