One who while intoxicated flops around on the dance floor with absolutely no control, must be supported by another person to function, just like a 'muppet' also has a hankering for getting stuffed in the butt.
A treat for her. Her lover places two or more well lubricated and inspection gloved, fingers, into her anus, then firmly massages her G-spot and it's related squirt glands, through several thick layers of muscular vaginal and anal tissue, against her pubic bone. She goes off like a gun if you do it right! Don't spare the lube! See also asspuppet, cornweasel, etc.
Maggie had never experienced the buttpuppett, and was anxious to see if she would squirt when she was bound and played, by the other girls in her cabin.
It is said of the situation where a person has the bad luck to make contact with his testicles against an undefined surface or object, intentioned or not.
Given the nature of the word, it is more appropriate to design cases where the interaction is made with a moving object, for example, a ball.
Although it is extremely painful for the victim, it tends to be considerably funny to people who witness it.
Today in the baseball game the pitcher took a nutshot; the baseball hit him in the nuts.
Man, I just watched the funniest nutshot video ever.