A person who eats only, or mostly, very unhealthy food.
- Last night I was really hungry and I invented deep fried bacon-wrapped donut sandwich.
- You are such a junkivore!
- Honey, if you go groceries, don't forget bacon, fries, sugar, soda, donuts, chips, doritos and ice cream.
- If you keep this junkivore diet, you'll be dead before you hit 60.
- So, how are things with that guy you met online?
- Really bad, he's a junkivore.
- Ewwww I must taste terrible!