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1.
means to duff somebody...kill em. Kill a dude them have the morgue staighten him out so they can put him in the casket.
..."I'm about to go straighten out this homo"

Mike: "Aye, you hear about Chris?"
Tony: "Yea, I heard some dude from Philly came to town and straightened his ass out, I guess it was some old business."
by B-G May 20, 2008