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To engage in an episode of mutual masturbation with a member of the opposite sex over-the-phone (i.e., phone sex)
"Wow! Me and my girlfriend just got finished phone fucking, and she sounded so hot when she made herself cum!!"

"I met this woman on the Internet, and I think I am going to phone fuck her before I meet up with her face-to-face"

"Because my husband is away for two weeks on a business trip, I think I am going to have to phone fuck him every night when he calls me!"
by Yeezus Fan December 10, 2013