Short for "Social Networking Artificial Face eXchange." This is when someone fakes being someone else on a social networking site. Typically done to get the someone else in trouble, start a fight or just trash the someone else's reputation.
Dude: "Hey, why did you say you were showing up last night on Facebook and didn't show?"

Chic: "I didn't say that on Facebook. I wasn't even on Facebook last night."

Dude: "I bet your roommate that you got in a fight with last week snafx'ed your Facebook."

Chic: "That bitch!"
von Stealth Ricochet 16. Juli 2009
5 Words related to snafx

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