When you jizz in a cup for a week, freezing it nightly, adding a layer of jizz every day. On the 7th day, remove the cup from the freezer and gently push out the frozen cum cylinder, grab a cheese grater and harmoniously grate the cum cylinder over a freshly devirginized catholic girl.
Martin: "Hey Eddie, how was your weekend?"
Eddie: "I met this girl Tiffany last weekend at mass, took her home and totally gave her a snowy nun!"
Tristan: "Dude, that was my sister!"
All: awkward silence