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1.
The ability to say things over the phone that normally would be difficult to convey.
Todd: Man, I can't believe Lisa called me a cunt rag!
James: Don't worry about it man, she wouldn't have said that to your face, she just grew some phoneballs.
by prankmaster May 18, 2007
 
2.
Confidence achieved by knowing the person you are speaking to isn't within punching distance.
He can be aggressive and rude because he knows the other person is a thousand miles away on the end of a telephone. He has massive phone balls.
by Steve Stevenly December 17, 2009
 
3.
When your on the phone with your parents and a girl makes-out with your neck causing you to receive blue balls and not pay attention to the conversation.
Morgan gave me gnarly phone Balls!
by Burnsssss October 27, 2008