A niddy noddy (http://en.wikipedia.org/wiki/Niddy_noddy) is a device used to wind a skein of yarn. You have to do this and hang the skein for a bit to even out the spin on hand spun yarn before you wind it into a ball on the ball winder.

"mung rag" is a generic term for the cheap dish towels that you keep in the garage for wiping the black crap off your hands when you change the oil in your car. I keep them around the coffee shop for cleaning up spills and getting the "sticky" off the outsides of the liquor bottles. I hate sticky bottles.