Dipping of someone's ass cheeks into a liquid. The liquids can vary from condiments to water.

After cumming load of sperm in the rectum, a man dip his cock in the anus with a full of creamy sperm and put it into girl's mouth

anal dip shit means that u r and anal (ass hole) and a dip shit at that same time
(there is no point of saying it just say dip shit
lol