Term more popular with the older generation. Refers to several things. A woman's sudden need to have a child, puberty, etc. are all supposedly controlled by a biological clock. As well as waking up and sleeping habits. Hence losing time after a long airline trip.
Oi...where's all this hair coming from?
Its your biological clock, man!
by shinji-kun June 20, 2004
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when a female begins to desire to have a child, or when a female develops motherly instincts, etc.
My friend won't stop talking about how sweet and cute babies are and how she wants to have one now - her biological clock totally went off!!

My friend says she doesn't want children...I guess her biological clock hasn't gone off yet.
by therealdef124 January 28, 2010
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1.) A female psychological disorder directly related to too much exposure to horse shit like "The View" "Oprah" and wing-nut societal archetypes that feel women must have children to be "complete."
2.) Yet another absurd ploy utilized by women to get men to marry them before their asses get too old - men are SO attracted to desperation. LOL
"I need to know where this relationship is going because I'm 26 and my biological clock is ticking!"
Translation -
"I need to know if we're getting married because I am sick of giving BJ's and I'm ready to over eat like my married friends do!"
by Buck June 20, 2004
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the loud ticking sound that wakes women up in the middle of the night once they begin to worry they may not have enough children to satisfy their maternal instincts (or insecurities), beware the woman who awakens in this state as it has been proven that they are highly fertile and irrational
last night my girlfriend woke up and started talking about saving $$$ for a wedding...?!?
by Tico June 20, 2004
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1) The reason that a women freaks out for no good reason.
2) Cause of PMS
Her biological clock is ticking like a time bomb
by INawtStupit126 June 20, 2004
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A senior member of the Clock Crew, and a very distinguished, dignified, and proper gentleman.

Also known as "Bio"
"Biological Clock is looking rather posh in his new trousers, wouldn't you say?"
by Golden Clock March 31, 2005
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A common excuse that women may use to guilt their significant other into marriage. More effective in a strong New Jersey accent, as portrayed by Marisa Tomei. This phrase originates from the 1992 comedy "My Cousin Vinny".
boyfriend: What's wrong?
girlfriend: The bills are late, we're out of Special K, 'My So-Called Life' was just canceled, and my biological clock is TICKING like THIS!
by Vamptastic May 5, 2009
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