SF is code for sexy Friday. So when I tell my girlfriend that we cannot have drinks Friday because it’s “SF”, the days we spend my husband and I spend an entire day of great sex with each other.
by Jmgantt15 July 31, 2025
Get the SFmug. An Xbox Live player who frequently plays RTS games, and is actually a member of a clan based off of an RTS game known as 'Command & Conquer' that originated shortly after the release of the fore mentioned game back in 1995. The clan he is a member of, worships the charismatic leader named 'Kane' of the evil forces known as 'NOD' and will usually be a very skilled player. Although many of the games this person has not played, this person, as most of their clan do, will usually pick the game up in a matter of moments, and be outplaying even the seasoned pros. Watch out for his tricks, he is known for being very misleading and WILL take advantage of a situation as soon as the opportunity arises.
Player: "Oh f, how did u know i was going to be there?"
SF napkin: "HA HA!! I was always watching, i am always watching."
Player: wtf man
SF napkin: "HA! you cant hide anywhere, so just come out and this will end quick....."
SF napkin: "HA HA!! I was always watching, i am always watching."
Player: wtf man
SF napkin: "HA! you cant hide anywhere, so just come out and this will end quick....."
by xboxliveperson August 14, 2010
Get the SF napkinmug. 
by Stensengern November 22, 2017
Get the SFmug. by Ayudamigo October 18, 2018
Get the Sfsmug. 