Jizzticulate

A portmanteau of “jizz” and “gesticulate.”

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.