When Jared Fogle dresses up for Halloween and follows a bunch of little children as they trick or treat. It can also mean an adjective "frankenfogled", which means for someone to get stalked by a costume-wearing Jared Fogle.
Parents: Now honey, don't go talking to any Frankenfogles tonight with your friends!
Random Guy: I bet frankenfogle will visit a bunch of houses tonight! Better barricade the doors and lock up my rock collection!