A bastard who is not worthy of having two balls.
girl 1: Tom broke up with me!!

girl 2: Oh my God!! He is such a one-balled bastard!!
by one-balled bastard April 05, 2011
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Sexual intercourse where there are no second rounds.
Girl 1: I'm sooo pissed!
Girl 2: Why would that be?
Girl 1: He pulled a one strike ball game on me last night!

Girl 2: Yeah, they tend to do that.
by catseye099 June 13, 2015
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