1) Term for a drug user. Possibly originating from the manner in which solvent addicts imbibe glue; they put the substance into a bag then repeatedly breath in and out with the bag over their mouth.
2) Its modern use is more likely to refer to a smack (heroin) addict and is usually a term of abuse.
1) That bag head was in my shop buying glue again today.
2) Some dirty bag heads left needles on the school playing field.
A scruffy bum who wanders aimlessly around the city centre pickin up fag ends,rummaging through bins and askin for"50p for a cup of tea". but really mean "i need some smack,i will drop my trousers and take it 4 20mins up the behind 4 a tenner bag"
Reply go away and die u dirty smelly HIV bag head , smack rat.