cross their arms across their chest
In volleyball to "kill" the ball means to spike it.
linesman (or linesperson)
You hit the net while making a play on the volleyball.
It means to volley the ball.
A linesman calls the ball in and out. He also watches for foot faults on the serve, touches, and out of bounds on the antennae.
To "sideout" means to hit it out of bounds on a serve.
an AVP is a volleyball league which has a volleyball brand,which makes that a common term.
The cast of The Linesman - 2000 includes: Frank Bock as The Linesman
Your platform is the area between your wrists and elbow where the ball makes contact
You mean the ball, the volleyball? To play volleyball of course!
An assistant referee, linesman is an outdated term, is there to advise the referee. If there is a disagreement between the assistant and the center referee then the center's decision stands.