Omnomivore is a slang term used for something or someone who will eat anything and everything. (Usually spoken as someone is about to consume one or something)
Commonly used by close friends as it may seem silly to say out loud.
"I just called Nicole an omnomivore..."
"You don't even know them, what's wrong with you?"
Omnomivore: A person who experiences intense pleasure when eating... Rather like an old-school 'gourmand', but somewhat less selective in their choice of comestibles. It should also be noted that an alarming amount of bacon is present in a typical omnomivore's 'diet'.
"There's carnivores, herbivores, omnivores... And then there's that fellow taking his third trip around the buffet. He's an omnomivore."