A person who is addicted to smak or heroin.
Usually short or a few important teeth and even shorter of common sense or lateral thought.
Normally found :
In dark alleys
In hoods (even in the bright sunshine)
Under Duvets (even in the bright sunshine)
Pining up in shop doorways (in the city)
Look at that Smak head there - he's wearing a hoodie and a coat in this weather. What a cunt.