A fork of Rural Dictionary
When a noble partner ejaculates into a condom, then pushes the sperm to the closed end before tying it the condom off. The young knight then grasps t condom on the open end of the condom. He flails it around his head like a morningstar mace before hitting his partner(s) in the head like a morningstar.
"Kyle was crazy last night at Susan's party. We were getting it on and after he finished he yelled "The Morningstar!!" And hit me in the forehead with his condom.