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2.
sweetback refers to a dude who is too smooth and fresh to go by any other, less respectful, term.
Shit, sweetback, you be smoove with the bitches!
by Marco St. John June 22, 2004
 
1.
70's black slang for a large penis.
Don't slip that girl your sweetback, she's got the clap!
by Dave December 13, 2005