This is signed as "YOU SIGN-FLUENT". The "SIGN-FLUENT" sign is very ASL. There is no direct-word translation of this sign to English. This sign is used to describe someone's signing as fast and smooth. You can create this sign by starting with both of your hands in the the S-handshape, opening your hands into the 5-handshape, wiggling your fingers slightly, and closing them into the S-handshape again. Depending on your facial expressions and body movements, this sign can mean "FLUENT,""very-FLUENT," or "exceptionally-FLUENT," for example.