Subset of belly rub, where a woman's uterine area of her abdomen is being pressed upon for sexual stimulation. An ordinary belly rub does not have to be sexual in nature, whereas this is. This can be done with anything such as a hand, a penis, or an object.
The location of the rubbing is higher than what is seen in fingering or clitoral stimulation, being the portion of skin somewhere between the pussy and the navel.