1) Jerk-off 2) Litterer 3) Masturbator 4) Mumbletypeg player 5) Onanist 6) One flinging something 7) One hurling something 8) One pitching 9) One who gives a flip 10) Person who throws something 11) Pitcher 12) Pitchman 13) Quoits participant 14) Restless sleeper 15) Salad maker 16) Salad maker at times Found on https://www.crosswordclues.com/clue/tosser
This is another word for wanker and has exactly the same meaning and shares the same hand signal. Unfortunately my house in Texas was in Tossa Lane, which was a problem when telling older members of the family where to write to me! Found on https://www.encyclo.co.uk/local/22179