Definition
"You're away" is golf slang which means you are the furthest from the hole and it is your turn to play. Generally, when a golfer says "you're away", they are telling you it's your turn to play and it is not meant in a derogatory sense. That said, more experienced golfers may use this slang for trash-talking their playing partners in good fun.
Usage
Looks like you're away, feel free to hit when you're ready!