Someone who is blessed with an exceptionally large penis. Following the common preconception that black men have large penis', this would refer to the penis being the one eighth of a person that is of black ancestry.
If you want to know why we call Blake octaroon, you'll have to ask him to show you.
by Manuel Tendo March 19, 2008
2 more definitions
Someone who is 1/8 black.
That girl looks real exotic, is she spanish Maybe she's an octaroon.
by fatassmuffinman February 15, 2003