The act of sticking one's thumb into a butthole as to ascertain poop on one's thumb. Swirling said thumb in a circular motion, just like the stick is used in a cotton candy machine.
"Yo bro, I totally gave some skank The Cotton Candy Machine last night and ate all of it" -Kyle
The candy machine was a device used for masturbation in ancient times and was presented by a kid named Elias on youtube, he was the creator of this masturbation device that yanked your balls and tickled the groin. Elias went on to die from internal groin bleeding....
"I just bought a brand new version of The candy machine!"
"That's fucking awesome, just remember to oil up so it doesn't rip the testies"