Surfing is The Act of Holding on to a Slanted platform (usually in the game CS:GO) by A or D and moving the mouse on such a way That you gain speed and can go flying off the platform with height.
Surf maps have been created Making the platforms in a row or line in such a way that you could surf from one to another
Surfing Also works on Games like: Team Fortress 2. Garry's mod. Half Life
A style of game play in the game Counter-Strike and Counter-Strike:Source. A "Surf Map" is a map made where the goal is to "surf" on "ramps" to get to areas of the map which contain weapons. A typical ramp is shaped like "/\". To surf on this ramp you would hold the Right strafe key (D) when you are on the Left side ( / ) of the ramp, and the Left strafe key (A) when you are on the Right side ( \ ) of the ramp.
CS:S Player 1:Have you tried surfing yet?
CS:S Player 2:Yeah, it's friggin sweet!