Standardly used in the sence of a cheating girl or boyfriend when the loyal party walks into a room to find their
significant other fucking another. From the point of view of the loyal party all that can be seen
from the door looking toward the bed are four legs, two assholes, a pussy (with dick inside), and nuts. The Pussyball kick refers to the action of the loyal party rushing to the bed and kicking or stomping the most vivid region...the pussyball region, injuring both
the pussy and nuts of both parties.