Top Definition
The longer a conversation lasts, the chance of someone mentioning the song "Friday" becomes closer to one. This is doubled when the day of the week is Friday.
Rebecca Black's Law was just proven true when you started singing Friday!
by Dinosauricorn April 01, 2011

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

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The Urban Dictionary Mug

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