Food Shark

Food shark:

An annoying (usually thin), food obsessed person who frequents picnics, parties and events for the sole purpose of sharking around the food table, monitoring every calorie other guests plate making them feel like fat, inept, sea cows.

Addendum: usually these people or their offspring are lactose, gluten, nut or fun intolerant. Usually hail from the East or West coast of the continental U.S., respectively.

Thanks to that damned food shark, nobody ate my pepperoni and cheese stuffed meatballs!