The process of holding on to someones arm and whilst walking an up and down movement is made
You do realise you are giving me an arm wank?
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Noun- A sport in which you play that gives you serious arm pain the next morning.
John: Wow, I have really bad wank arm from yesterday...
Alex: What were you playing?
John: Tennis.
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One arm is bigger than the other
Sarah said hey look at my wank arm it's so much bigger