rock rental
n.β Β«The dropped public records charge stemmed from what Sheriffβs Office spokesman Capt. John Fortunato called a “rock rental,” where someone loans an automobile in exchange for a rock of cocaine.Β» ββWest Bank School Football Star Pleads Guilty To Drug Charge” by Joe Darby, Greg Thomas Times-Picayune (New Orleans, La.) Aug. 11, 1992. (source: Double-Tongued Dictionary)