Meaning

1 senses
  1. (US, not comparable, slang)Having a large penis.

Origin

From the pseudoscientific notion that black men tend to have larger penises than those of

From the pseudoscientific notion that black men tend to have larger penises than those of other races.

Wiktionary, CC BY-SA 4.0 · source

See also

neighbours in the dictionary
black where it counts — meaning, examples, forms, synonyms | Krumeto