Someone who eats fast food frequently or over indulges the fast food experience; ordering specialty items, mixing condiments, requiring tedious preparation before dining, or preforming ritual or traditional tasks prior to consuming.
"Yes, notice the way she is piling copious amounts of their special sauce on the top of her food."
"My god, did she bring utensils from home?"
"Look, now she's arranging a massive collection of french fries in what appears to be a recreation of Golgatha."
"They will be forced to remove her from her seat using the Jaws of Life after inhaling all of that."
"Quite a McPiggins."