Poxcannon

 is a gun that fires poisonous t-shirts that have significant knockback. Enemies poisoned by this gun leave behind a pool of poison creep upon death.

Synergies

 * If the player has Pig, it turns green and fires flaming bats.
 * If the player also has T-Shirt Cannon, both guns fire explosive wardrobes at the end of their magazines.

Trivia

 * This weapon may be a reference to a practice of American colonists of infecting American Indians with blankets infected with smallpox.
 * This weapon may be a reference to the 'Pax Pox', a blanket term for diseases contracted at conventions.
 * The tagline refers to the merchandising meme "I [achieved something] and all I got was this lousy t-shirt".
 * The term "Lousy" in this case may also refer to Lice, which are parasitic insects.