Green’s Dictionary of Slang

1. a boy with a tight-curled, ‘knotty’ head.

1994

C. Major Juba to Jive.

2. an unattractive woman, esp. one with short, fuzzy, nappy hair.

1980

E. Folb Runnin’ Down Some Lines 228: B.B. head 1. Unattractive female. 2. Unkempt female. 3. Female with short, nappy hair.