Someone who eats ketchup with almost every meal, it is as much a staple of their diet as bread and water.
Some signs are you freak out when you realise there is none left in the household(ketchup famine) meals without it seem bland. When u have a bottle in your car or bring one to work or school.
Collapsed in an alleyway red stained clothes clutching a bottle of Heniz. He must be a ketchup addict.....
Someone who puts ketchup on everything and like the smell of ketchup. Like the color red
Julian is a ketchup addict because he put spicy ketchup on his soup