syrup head noun a person who abuses for non-medicinal purposes non-prescription medication containing dextromethorphan (DXM) US
Youths’ nicknames for DXM: Robo, Skittles, Triple C’s, Rojo, Dex, Tussin, Vitamin D. DXM abuse is called “Robotripping” or “Tussing.” Users might be called “syrup heads” or “robotards.” — USAToday, p. 1A, 29 December 2003