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1.
1. A person who always insists on putting several if not all available toppings on their food items, i.e. frozen yogurt, hot dogs, ice cream, etc.

2. A person whose core diet consists mainly of snack foods.
Wow, look at that snackajawea over there loading up their fro-yo with every topping known to man
by Charles of the Smith Clan July 12, 2010