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To ruin someone's facebook profile by changing the details, status, pictures and sometimes joining or creating groups.
Someone just face-crashed my profile, I logged in and found that I am now intrested in men, that my intrests are being gay and that my profile picture is now a big pair of balls, I can't wait to catch the bastard that did this.
by Arthur C July 10, 2008
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Girl on boy:
Girl jumps naked from a height, spread legged, in order to land straddled on a boys face resulting in oral sex and the boy crashing to the floor.
"Omygod that guy is so hot I would totally facecrash him."

"If anyone needs a place to crash, they can crash on my face."
by Bobisactuallyagirl January 04, 2009
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