1 definition by Tris Shedaw
The act of penetrating your female partner's rectum with your thumb and inserting your other four fingers into her vagina. Move your thumb and fingers as you would a sock puppet, thus creating a cookie eating monster. (Voices are encouraged for maximum arousal.)
My girlfriend likes to role play, so I suggested Sesame Street. I rolled her onto her stomach and gave her the cookie monster until she squealed like Ms. Piggy.
by Tris Shedaw December 6, 2010