(verb) to finger-fuck a small person so vigorously that through the combined motion or their own climax, they flail around and yelp like a muppet. The person fingering is the muppeter, the person being fingered is the muppetee. Past tense: muppeted.
I hooked up with Janine last night. She was so into it I ended up muppeting her.
by Edward Lindemunder November 29, 2005
When you put your hand so far up a girl's vagina (or boy's rear) that you can manipulate their mouth to move with your fingers.
Holy shit that girl is so hot. I would spend all day Muppeting the SHIT out of her.
by Bear von Erck April 21, 2011