When you make your girlfriend sit on the ground naked and you make a fake cross country ski action with your penis in and around her mouth, essentially throat fucking her while practicing for the birkie. To alter this to a shimenzstein, simply finish the act by eating chocolate cake out of her ass.
"Dude so when she finally came to lacrosse I caught her off guard with the shimenstein while she was drunk. Needless to say, I fulfilled her caloric intake for the day."
by poopoopat January 20, 2010