Cunny sack
Also known as a foopa. On an obese woman its the 2nd hump below the large stomach. Most noticeable with yoga pants or sweat pants. Essentially its the fat rolls above the crotch stuffed into her pants.
To see many examples of cunny sack, just go to Walmart on food stamps day. Look on or in the immediate vicinity of a mart cart. Around the potato chips or soda aisles are other places that draw in these hippos.