a person who takes large ammounts of class A drugs, more specifically heroin. These people are easily recogniseable by the clothes that they wear and their stench due to them selling every possesion to get more heroin.
by fatboy April 13, 2004
Usually means somebody you don't like you refer to them as 'Scag heads'. Tramp, ugly, unpretty, nasty, unpleasant.
by *~*Bird*~* October 31, 2005