a food or drink so hideous that it sticks to your innards and turns your psyche into a cold blooded shell of your former self while at the same time, melting your ass with volcanic poop causing you to scream in pain and agony.
( joe comes into dining room and unveils his tuna and snapper sandwiches. upon consumption all the guests dash to the restroom and screams of agony are heard)
mutant guests: blood!!
(at the hospital later)
joe: they had evilrea? so that explains the death like smell coming from the restrrom.