1: Direct shebag. A female accomplishes this by rubbing her naked genitalia on the face of a passed-out or otherwise incapacitated individual, resulting in a fine coating of cooze.
2: Indirect shebag. The more devious form; the female physically inserts an object (a toothbrush, say, or an eating utensil) into her vagina and then replace it without warning. This will often, but not always, result in a thicker coating of cooze, possibly incorporating cervical mucus. Regardless, the shebag is only considered complete when the female informs the victim of her act, preferably after the victim has placed the affected object in his/her mouth.
2: You know how Nick worships that $100 pen? Well, when I was fucking his sister, I got her to shebag it for shits and giggles.