A phrase/ mental disorder which discribes the social immaturity displayed by women(ages 14-19) with flat chest. It's usually diagnosed by a friend or first time aqaintance who notices certain idiosynchrasies that display annoyance, or in gereral over compensation.
Victims of FCS often display narcissism, or self-centeredness; They often try to compensate by trying to be intellectually superior or catty.
It's often grown out of but the long term effects can only heal with time.
Victims of FCS often display narcissism, or self-centeredness; They often try to compensate by trying to be intellectually superior or catty.
It's often grown out of but the long term effects can only heal with time.
Abel- Dude (girl) is being so annoying
Chelsea- Yeah I know she must have Flat Chest Syndrome(FCS)
Abel- Oh yeah she's deffanently FCS positive.
Chelsea- Yeah I know she must have Flat Chest Syndrome(FCS)
Abel- Oh yeah she's deffanently FCS positive.
by Chabel Roeschstraviz March 26, 2008
Get the Flat Chest Syndrome(FCS)mug. by The Italian-Romanian guy. August 1, 2023
Get the ea sports fc 24mug. by cloudinthesky January 1, 2022
Get the FCmug. 
Biggest gobshites ever . Think vvd is the best centre back in the world the one season wonder twat .
United fan : how many times have you won the premier league
Delusional gobshite from Norway : 6 tImEs
Man united fan : go and die you little bin dipping rat you live in a cousil house back in Norway where you wank of Slippy g But then remember that he’s never won the league but Rooney has stalling has and even Ashley young has you twat .
United fan : how many times have you won the premier league
Delusional gobshite from Norway : 6 tImEs
Man united fan : go and die you little bin dipping rat you live in a cousil house back in Norway where you wank of Slippy g But then remember that he’s never won the league but Rooney has stalling has and even Ashley young has you twat .
by Mufc20times December 14, 2019
Get the Liverpool FCmug. 
