Red Lining It Share definition Flag "Red Lining It" is a way of saying that you are driving really fast, reffering to the red line on a car's RPM gauge. My buddy was red lining it when he was tryin to get over here. Red Lining It by Icarus0311 October 9, 2006 0 0 Get merch Get the Red Lining It mug. Buy Now — $32.95 See more merch