(noun) take a
woman over, say, 275 pounds, 45-55 DDD or bigger chest, a roll under her bellybutton like a fullsize
loaf of French or
Italian bread, rolls in her crotch like a 3rd (and 4th) set of labia, a pad of fat on her mons, huge buttocks, and you can't really get half-way into her in ANY position because of fat keepin' you away from her vagina so's you can bearly get your "head" into it