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1.
When you're too fat and out of shape to even play a game of darts, that afterwards renders your arm sore and useless.
Damn, that crazy best of three last night gave me the dart arm.
by ltschmellt November 16, 2007
 
2.
the inability to play beer pong on a Friday or Saturday night due to the fact that you played hundreds of games of darts during the week.
"wow, i cannot make a cup tonight, I think i have a case of dart arm"
by John232115 February 20, 2010
 
3.
What Jim Holmes "claims" to have when I am whooping him in darts!
Joe- "Damn, I am up sixty points on you!"
Jim- "Yeah, only cause I have dart arm."
by JoeyP January 16, 2007