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1.
A white person, usually a young guy, who tries to act black and overdoes the whole deal. (Like the candy bar, he's white on the outside and brown on the inside.)
"Look at that Scott with his droopin' pants 'n' gangsta gait! He's a total zero bar!"
by hootnannie October 22, 2009
 
2.
Gay clubs, named after the Gary Newman sone from the eighties. Gary usually had gay themes in his songs.
Steven, Bruce, and Trevor like spending their weekends in zero bars praying to the alien.
by Nathan Burns September 15, 2006