A homeless man with middle fingers missing on both hands, giving the appearance of crab like claws instead of hands - or clumps.
A Clumpy is also a popular dance move, where a person walks sideways like a crab and imitates picking up cans with their outermost fingers. An odd, distorted face usually accompanies these movements.
When fat girls wear skinny jeans, leggings or any tight pair of trousers for to long and it makes their ass roll like Swiss cheese. The girls that usually have clumpy bum are usually very morbidly obese and wear seventeen layers of makeup. They look like a canvass that wears a crop top and has rolls or their ass