The meaning is "For Christs Sake" used mainly for internet chatting with god hating youngsters
Person 1: Why did you just say that about my mum?!?
Person 2: Have a joke with me FCS!
Acronym for 'Fucking Common Sense'
FCS is really the only thing in this world you need to survive.
Not touching the stove because you know it's hot is an exercise in FCS
Mary wanted to sit outside for lunch at the local bistro but, decided to dine inside because it was raining. - FCS
A term originaly used by Dance Dance Revolution players, meaning to "full combo" a difficult section, or the entire thing by not missing a single step. Recently, the term has been used by Guitar Hero players when they complete a difficult section in a song or a completely full combo the song by not missing a single note in the section or song.
Dance Dance Revolution fc
bystander: look at that crazy fat kid! he isnt missing a single step!
Guitar Hero fc
bystander: look at that PriestMLH! he isnt missing a single note!
Fc stands for favorite cousin
I’m going to the movies with my fc
Fc means favorite cousin .. a slang usually used in the south.
Me and my fc (favorite cousin) are about to go out.
Friend crush. Someone you love, just don't want a romantic relationship with.
"I love my FC Michael! I want him at my wedding, just not in it."