1)A 'boy' usually around 21 who likes to have sex with young girls.
2)An ex-con who was in juvy (not real prison as he usually claims) for stealing cars
3)An idiot
4)A person who can't get served even though they are 21.

Car thief normaly between the ages of 13 and 20 ish but can be as young as 9 if you live in Rye Hill (Newcastle).
Car is usualy burnt out in the nearest back lane or field.