The Swearaphone is a weapon used in Battle Bears: Zombies. It stops the Huggables by swearing into it. This particular weapon is a megaphone and Oliver gets ammo for it by looking in a dictionary for new words. As a joke, it censors Oliver before he releases the swear.
The Swearaphone does not actually hurt huggables, but it stuns them so the player can fire at them with other weapons for 6 seconds.