by jim bob March 04, 2004
The button (or sometimes a knob) found on the dash of a pickup or suv to lock the transfer case in four wheel drive.
by pfleeger2010 January 08, 2011
A button in a car, usually labeled 'overdrive' or 'sport mode,' that allows the driver to switch from regular driving settings to having the full output of the engine go straight to the transmission and tires. Higher RPMs and thus speed are a by-product. Mainly used when climbing up a hill so that the engine doesn't struggle too much in a lower gear, or when quickly passing another vehicle on the road.
by seraph2010 August 28, 2010