When you get a green liquid mess such as kiwi juice, pea soup, wheat grass shot, etc. on the front of your nice, clean, starched shirt.
Bob: "What the fuck is on the front of your shirt?!"
Sue: "It's alien jizz... after being anally probed, the Martian men decided to use my shirt as a cum rag, tastes delicious!"
The process in which a person ejaculates on another person that is either asleep or unconscious. The ejaculation MUST successfully occur without awareness of the other individual.
"Man, Sarah drank a bunch of vodka and passed out last night and I totally ghost jizzed her."
The following morning...
"Oh man, my face is so sticky, I feel like a ghost jizzed on me!"