Top Definition
When one's parents forget it is your birthday because you are the fourth child. They have celebrated the other three kids birthdays, and told you about it, but forget yours.
I am thinking of calling my parents tonight to remind them it is my birthday---but then they will feel bad they have forgotten it. That is the essence of "FCS or Fourth Child Syndrome".
#fourth child #born as fourth child in family #not as important #never first #better than fifth child
by Auntie N September 18, 2010
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