What is Sidehacking?
1.
A stealth form of male masturbation performed while wearing pants, typically in a semi-public setting such as a movie theater or while driving. In order to sidehack a man must first position his penis along his inner thigh. He will them stimulate the penis by rubbing or stroking his inside thigh through his pants.
You see that hot chick at the bar last night?
Yeah, I was sidehacking it the whole way home.
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