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To be distracted by something mid-sentence.
You: I got a new shirt and-
*car passes*
Me: Stop yellow balling and finish telling the story.
by Kaichiturtle November 10, 2006
When a guy is talking tough but you know he wouldn't even start something.
Pete started talking tough on how if he saw Jake he would drop him. Except that he kept swaggering away IN THE OTHER DIRECTION, with the biggest yellow balls between his legs.
by Pseudopun June 11, 2013