a crackhead (also see fiend, beanheads) or a slag/sket.
some people are reffered to as bitty's if they are cat for weed or always in quest of getting weed and never gets any.
'that Anwer guy is a bitty, always cattin for 2 bun on the roach'
'you seen Ambermae recently? walkin around with her batty hangin out lookin like bitty number one!'
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