When a human being is so out of control it is as if they are being controlled by a muppet. (The implication is that the human has a muppet's hand up his or her ass, controlling his or her every move.)
by Jeemus LeBouche March 25, 2007
Having no control of your own but that of a muppet, with its hand up your butt making your every move for you.
There's a muppetic irony to Petey's lack of self-control...I suspect Kermit, what with his brown-stained hand and all.
by Richree July 26, 2008