The overwhelming protrusion of the flanks of flab on a generally fat woman. It's like enormous Love Handles that help when mounting a Ba-Donka-Donk. They can easily be noticed when a large woman is wearing clothing that might be a bit too small.
Holy cow, check out the Side-Donka-Donk spilling out of that chicks shirt when she sits.....
by G-Skeezay November 4, 2011
Get the Side-Donka-Donk mug.