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1) A disparaging term representing the unbridled anger of an out-of-control African-American male of the lowest tier of socioeconomic classing.

2) More broadly, the rage of any member of the human species exhibiting said anger.

Etymology: A portmanteau of (ne)gro and (ste)roid rage
Man, let's get the hell outta here, that dude has some serious groid rage!
by eggplantman September 18, 2008
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