tricky magician

The act of inserting one's finger into their partner's anus, and upon complaint, slightly curling the finger and pretending it's stuck until you can successfully yell to your friends in the other room for help.

"Bob pulled the tricky magician on Tiffany last night. You should have seen her face when we ran into the room to help him!!!"

Slapping the bishop

Another way of masturbaiting but sometimes it can be used for furiously masturbaiting.

Man: “hey are you alright??”
You: “ nah I spent all night slapping the bishop.”