To go through a friends friend list on facebook and jack friends from them. Identical to Spacejacking on Myspace, only on facebook.
Man, Emily's got some hot friends. I'm gonna have to facejack a few of them.
by ODUB October 20, 2009
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Someone or group of people that comment on your Facebook post and then carry on to have their own unrelated conversation.
I posted on Facebook about my swollen ankle. Bob and Margret both replied then carried on talking off topic to themselves on my post! You fecking Facejacker!
by TC5712 March 15, 2016
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