1. When you get confused and wanted to say ejaculate, but start saying jizz then you commit to the whole ejaculation idea and create a monstrosity of a word.
To jack off to the point of coming, at which point the hand follows the jizz stream outward and away from the body, resembling a wildly emphatic gesture similar to that of an Italian or Jewish grandmother.
When my girl got up to put her clothes back on, I incredulously jizzticulated that she hadn't even licked my asshole yet.