1 definition by Nico Edtinger

Top Definition
A second occurence a full moon during a calendar month is called "blue moon".
On July 31st you can see a blue moon.
by Nico Edtinger August 03, 2004

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug