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1.
Perjorative term; urban slang for a black bowling ball(s).

"The Klansmen attacked African Americans in the Bowling Alley with baseball bats, while the Aggie decided to attack the bowling balls. When asked why, the Aggie said he wanted to "smash their Nigger Eggs".
by Missy Kens January 06, 2007
 
2.
Synonymn - A bowling ball.
"Luther is clearly dumber than a sack full of nigger eggs."
by Ol' KY Dad November 11, 2009
 
3.
Slang for watermelons.
Hey Cletus, that pallet of Nigger Eggs reminds me of "Invasion of the Body Snatchers"
by Mr. Whiiiiite March 08, 2009