Top Definition
A large line of cocaine. Looks like an alligator's back jutting out of the water.
Person 1: Dude I just got an ounce, lets set us set out some gatorbacks and ride out.

Person 2: Aight.
by 5 double 0 August 20, 2010
When you do a big line of rocky cocaine.
Hey Man, hurry up, we don't have much time, just cut out a gator back.
by Patrick Keith September 18, 2006
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