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When you rape yourself on Facebook (see frape). It's not rape if you do it to yourself, hence masturFBation.

Typically enacted by people who want to make it look like they have friends hijacking their Facebook account, but are really just very bored.
Kanodia, stop masturFBating yourself just because there's no one around to frape you!

A classic case of masturFBation.
by Kundvihari December 19, 2010