A large female or male. Often very ugly, fat and smelly.
A heaper can be seen hiding in the shadows of the night, too embarased to come out in the light. A heaper is not unlike a 'Bograt' or a 'Stinker'.
"ohhh man, did u shee that heaper just duck into that side street"
reply: "Nah i missed it... oh wait, its back again... what a heaper"