A very strange individual who has fallen in love with the very strange drug DXM. Once the good effects have worn off, they often come crawling back to society, blaming the drug for their insanity.
Johnny the syruphead drank cough syrup, said "I'm messiah." His friends abandoned him. Some time later: "It was the NyQuill ... The Nyquill!!!!"
One who uses DXM (dextromethorphan) recreationally, especially in cough syrups.
Watch the syruphead gulp down that nasty 8 oz. bottle of Robo!