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1) Someone, male or female, who has exactly 1 testicle.

2) Someone who has only one ball, most probably due to masturbating too much. Could be either male or female, or both.
Girl 1: "Did you see Elizabeth masturbate with a vibrating toothbrush the other day?"
Girl 2:"Yea! She was in the locker masturbating!"
Girl 1:"I'm getting scared for her. She might become a monorchid."
Girl 2:"You mean she'll grow a ball masturbating so much?"
Girl 1:"Yea."
by I love you Liz January 01, 2007
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