Top Definition
Abbreviation for 'You made my day' used preferably in newsgroup discussions in reply to some funny posting
>>Dividing by zero is possible
> Sometimes. Call it 'Nullion' and you're gonna be world-famous.

TYVM,YMMD.
by *Tom* January 17, 2008

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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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