Top definition
( noun ); The dirty spray that comes up from the rear wheels of the vehicle in front of you, as you drive on a rain-slick road.
Driving is dangerous if you cant see the road clearly. Keep wiper fluid in your car to wash away the road-phlegm.
by YoucancallmeFloyd November 12, 2007
Get the mug
Get a road-phlegm mug for your Facebook friend Sarah.