The noise made when you rub your index finger over your lips to confirm to your mate that you did stuff with the girl you are next to or conversing about. Originally used as a code when infront of said girl but has now found it's way into general conversation
/BRrBR'rb'bxx'xksxgxkx'xKRhxgægfffsfsfeougx.kffffffffssssdx'xKRkoRKkfdj/
used for a informalabbreviations to show feeling that you have nothing about to say but also simultaneously confused.