Top Definition
The result of a dramatic increase in alcohol consumption combined with cafeteria style eating you encounter in First year of University. The Freshman 15 taken to a whole new level.
Trevor- have you seen Maddie lately?
Jordan- the weight gain?
Trevor- she's hit the dirty 30
Jordan- classic

Calum- getting a little husky there bud
John- I know, it's the dirty 30
by DonkeyKong_ April 30, 2010
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