The unnecessary use of social media when a private message is more appropriate - usually with the intent of indirectly showing off.
An example of Facecocking as written on someone's facebook wall:

"Hey girlfriend - I'm in a cab in New York right now. Meet me outside the club in five minutes."

"Hey dude can I borrow your bike? I'm going to ride across the country tomorrow. It's going to be rad."
by Borax500 August 11, 2012
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During the foreplay stage of a sexual encounter, the male participant(s), without provocation or explanation, repeatedly thrusts his erect penis into the face of another individual.
My roommate couldn't seal the deal, so he facecocked that ho.

We were about to fuck, but he facecocked me.
by Art Cocheese September 17, 2007
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When a person is wearing braces, his/her face and mouth tends to look as if they are sucking/blowing on a cock, hence the word is formed.
You're a facecock because you have a metal mouth.
by syusyu January 8, 2010
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