throw-helper
nounUK /ˈθrəʊˌhelpə/
US /ˈθroʊˌhelpər/
A person who helps someone throw something.
The throw-helper caught the ball and tossed it back to me.
OTHER MEANINGS
2. A device or tool that makes throwing easier.
This little throw-helper launches the ball far.
3. A baseball practice partner who helps a player warm up.
The coach acted as a throw-helper before the game.
4. A software routine that assists with sending or raising an error.
The throw-helper logs the message before it is sent.