The specific odor of a ripe homeless person, especially (but not limited to) a subway dweller in New York City. It is impossible to describe fully, but can contain any/all of the following: urine, feces, general body odor, filthy hair, lice, garbage, dirty clothes, grimy train smells and disease. Once experienced it can never be forgotten.
"I was really excited to find an almost-empty subway car at rush hour, only to discover (after the doors closed and we left the station) that it was contaminated by bumreek."
Much more comprehensive than just a gunt. A Guntunda is when the gunt is not restricted to simply the front of the body, but instead wraps around the entire back and meets on the other side. Side, front AND back, the whole package of fat. It takes a special sized and shaped woman to display this, along with the proper clothing choices. A delight for gunt lovers everywhere.
Sha'niqua was so far beyond obese that her gunt turned into a guntunda.