The southerly appendages of the male reproductive system, contained within the nad bag, and known to swing back and forth, not unlike the clock weights in a grandfather clock.
Eric to Harold in the 1981 Brokeback classic, Chariots Of Fire: "I do so hope this running ends soon Harold old chap. My gentleman's clock weights are chaffed redder than a baboons arse!"
von Fatlad 14. August 2007