A Pop-Tart that has been jizzed on. Usually courtesy of a roommate or stranger. When considering eating a known Jizz-Tart, do be warned of the potential risks of STDs and/or deliciousness.
"My pal gave me a Pop-Tart for a snack. That jovial prankster didn't tell me it was a Jizz-Tart, and now I have herpes. What a card, right?"