Testicles, especially when receiving oral sex.
My chin bumpers were sore after the bitch gave me head for an hour
by djslut September 20, 2005
The nuts that swing low when letting someone smoke your bologna. Usually on a warm day when the baby makers are hanging long.
John does not like fish. John would rather have an order of chin bumpers with a side of cock sauce.
by mark sil March 01, 2006