When you, as a younger man/woman/whatever, groom an elder gentleman/gentlewoman/gentlewhatever into pursuing yourself despite their moral objections. Hence turning them into a nonce.
Person 1: Did you hear about what happened to Lewis?
Person 2: Ali, through reverse noncing, got him into bed
Person 1: No fucking way, Lewis is like 10 years older than him and not into younger men.
Ruler of Lake Titicaca. Rumored to have a bunghole that gets very angry if it does not receive toilet paper. Cornholio the Great is often seen walking around with his shirt over his head and his hands in the air, chanting songs about his power, and his bunghole.
"I am Cornholio! You do not want to face the wrath of my bunghole, for I need TP!"
Butthead: Shut up, Beavis! (uh huh huh huh)
Beavis: Um, okay. (heh heh heh heh).