Top Definition
A burlap sack with the appearance of a sack of oats, yet containing a "rocket gun". Concealment of illegal substances such as marijuana or crack in what appears to be a harmless burlap sack.
Officer: Sir, license and registration please, and could you please tell me what is in the backseat of the vehicle.

Bassline: That's just a sack of oats.
by Bassline May 19, 2006
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