The abbreviation for the rank of Sergeant First Class in the United States Army and is currently one rank above Staff Sergeant(SSG) and one rank below Master Sergeant(MSG) and Sergeant First Class(1SG). Also called E-7.
"Damn, can you believe the shit that comes out of Nancy's mouth at the meeting today?"
"Yes, I can. She's an sfc. She has nothing intelligent to say ever."
By Jacinda
SFC
Stinky FingerClub. The art of inserting ones finger(s) into a girls anus. When completing this act you automatically become a member of the SFC, Stinky Finger Club.
Whats Kieran up to? Just continuing his reign as founding member, and president of the SFC.