1 definition by Slippery Peat

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
by Slippery Peat July 3, 2005
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