The act of tapping a nut sac on a sleeping or an otherwise unconscious person's forehead not once, but twice. Only doing so once would be a prince nutty or some shit. The downside to the king nutty is that the victim isn't aware upon regaining coconsciousness. Suggest taking a picture or a yokozuna.

(noun) A successful type of theft which results in an acceptable, impressive and rewarding payday for the protagonist.

To place one's balls upon another's forehead whilst they are sleeping.
Taking a picture IS mandatory!