Top definition
petro-rain

Rain in Louisiana created by a mixture of saltwater and oil from spill in the Gulf of Mexico.

This is really happening...
Jon: They used to say, 'It's raining Cats and Dogs'.

Rebbeca: Yea, now it's raining Oil in Louisiana.

Jon: They call that perto-rain. Tru-story.
by ChrisDocJ June 23, 2010
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