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A hard substance (harder than dolemite) that white slavemasters and overseers used to make slaves toil over for endless hours at a time.
Slave 1: Cum own Kunta, let's go own down by 'da river 'n rest a spell.

Slave 2: I kain't. I'zz to busy bustin' up dis Shiffaroe!
by Knowlege Doctor May 18, 2008
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