The act of taking a Baked Potato in one's hand, and then inserting said hand with afformentioned potato into the rectum of another person up to the wrist, thus becoming an Irish Wristwatch.
Did you hear what Sally and Jenny did last night? Sally gave Jenny an Irish Wristwatch but forgot to take the potato out with her hand.
Actually originating in the piedmont of North Carolina, the Irish Wristwatch occurs during anal intercourse. The male, lying on his back, is mounted by the female; she rotates (preferably clockwise) while drinking a bottle of Irish Cream, whether it is Bailey's, O'Mara's, etc.
Sexual act performed by inserting a potato into an orifice (generally a vagina) and twisting your wrist as though you were checking the time on a watch.
Potato used in place of a dildo.
This act typically follows or accompanies copious amounts of drinking, usually whiskey or beer but also mixed drinks - such as Irish carbombs.
I met this kinky chick at the bar and went back to her place, where I gave her an Irish wristwatch.