I grew up in Red River County in Northeast Texas and people would say "rinktums" to someone with a fresh haircut and rub the back of their head harshly in an upward motion with a knuckle. My mother says people used to say "Rinktums on your haircut" then rub the back of the person's head. My wife, who grew up in Western Louisians, had never heard of it, neither had her mother, so I decided to look on the Internet to see what I could find.