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Full body shutter
This term originates back to the summer of 2007. Originally an involuntary spasm when touched by a disapproving female, it has since been adopted by others as a formal way to communicate "that's really gross", or "that's fucked up."

It can be used by males and females and should not be overused. If a person is incapable of shaking the entire body in disgust, they are not allowed to say "aww, fbs", and are excluded from the fan club.
Jen: OMG, Stacey is giving Phil a hug. That bitch!
Jon: Yeah but he's having an fbs, he's clearly not interested
Jen: What a relief! I'm glad fbs exist!

NOTE: The above example is based on an extremely true story. I swear.
FBS by Peaters Griffiens April 17, 2009
FBS stands for full ball syndrome. If you have not released a load in atleast 24 hrs or more, you may be suffering this malady
Dam baby, I really need some sugar, I have a deadly case of Fbs
FBS by sugarbear April 20, 2014
Flappy Bird Survivor

A person that has been in the same room as a person playing FlappyBird and raging.
Girl: Omg, I'm a FBS! Victoria was throwing books at people
FBS by AntiRanchGirlOC February 23, 2014
French Baguette Styley

Abreviation, to be well hung, have an abnormally large penis, it is usually split into three parts, Senior, Intermediate and Junior starting at the tip going to the base, Junior and Senior interchange but Intermediate is always in the middle. If you are FBS you bang a lot of birds, but don't like bragging about it.

Geoff likes boys and willies
Geoffrey is FBS, also like a pringle tube, or a beer can...swinging
FBS by Beanseen February 4, 2010
the Fluffy Bunny Squad a group of people from holt high AL that usually is a stoner, plays hacky sack, in is a juggalo (fan of icp)
FBS, Bunnyism, spades, mulit man, toothpic, ect srry 4 the 1s i left out
FBS by MMSullivan_FBS October 12, 2012
FBS is short for the Fucked-up Broadcasting System is used when somebody is so trashed, they feel the need to tell people about it.
Joe: "Man, I'm so fucked up!"

Friends: "Joe's using the FBS."
FBS by Dorene January 11, 2009