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2.
A white or caucasian person trying to act black
Hey did you see Jimmy? He is wearing some baggy pants, a flat brim hat, and some huge diamond earrings. Yeah I saw him, he was totally blacking off!
by stokley17 January 26, 2010
 
1.
When you have drank so much alcohol that you are blacked out and decide to masturbate to no avail, and not being able to remember
I walked in Matty O's room last night and he was blacking off
by State O State October 16, 2008