A tattooed blue dot on the wrist of a white person which is code speak for white supremacy.
I noticed his nigger dot, but said nothing.
by Frankie417 December 27, 2011
A common prison tattoo, the nigger dot is a simple blue dot on the wrist.
Joe had a nigger dot upon his release from prison, indicating he was in a prison gang while incarcerated.
by JasperG January 29, 2009