Term originates from 1980's. Originated at Braintree High School,South suburban Boston, used to address a fat ugly slutty girl from Quincy.
Not only is she fat and ugly, she's a slut, a Boo-hog.
A chubby party girl of rather easy virtue, who is fun to hang out with at bars and parties. Boo-hogs are not attractive, but not entirely unattractive either. Their preferred beverage is either beer, or more beer. On certain nights, when one finds one's beer goggles firmly attached, and in the absence of other more desirable sexual prospects, a boo-hog can be the object of a quick, mutually satisfying encounter. However a boo-hog rarely makes for good girlfriend material.
Well boys, the bar is slow but at least the boo-hogs are out tonight. Let's go buy Katie and Margie a half-dozen pitchers and see where the evening leads us.