What's hanging from your cat's tummy?

Is this flaccidity, is the feline overweight?

No, this is the primordial pouch, and is common in some cat breeds.

It appears in the adult stage, as a kind of hanging skin, regardless of whether the cat is overweight or not.

The primordial pouch in cats is a genetic inheritance that has been maintained since the first breeds of wild cats.

Today it seems it does not have a key function, but it is still useful on some occasions:

Protection: one theory is that the pouch and its fatty cushion offer protection to the cat’s internal abdominal organs, which would be especially beneficial for wild cats.

Flexibility: another theory is that the pouch provides extra flexibility while running, enabling the cat to cover more ground with each stride. This flexibility could also aid a cat in cutting from side to side quickly when they are escaping predators, or while they are chasing prey.

Energy: it's also possible the primordial pouch comes in handy when food is scarce. Some theorize that the pouch may act as a fat reserve, storing fat that can be later used as energy if reliable meals are unavailable.