To save gasoline by putting a car into neutral (or depressing the clutch) when going down a hill.
The origin is uncertain, since Okies are not likely to encounter sizable hills on their native turf.
Compare with Jewish overdrive.
The origin is uncertain, since Okies are not likely to encounter sizable hills on their native turf.
Compare with Jewish overdrive.
by Cap'n Bullmoose April 21, 2005