Top Definition
A girl rides a guy while knowingly on her period...he cums inside of her and she squeezes out a mixture of her blood and his cum all over his dick...like a mixture out of a yogurt machine...thus creating LAVA FLOW.
Here it cums!!!!!!! Lava Flowwwwww!! Oh no...It hasn't burst for years like that!!! Watch out for magma! Or Smegma! Runnnnnnnnn!
by Seth Green Lookalike April 04, 2009

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An expression that describes a morbidly obese person's rolls of fat, usually, but not limited to, the torso of their body. Typically, these rolls of fat are spilling over pants, shirts, or any other articles of clothing, resulting in a visual analogy to lava flowing over a wall, embankment, or into a body of water.
"Oh my, look at that person's lava flowing over their pants!"
Or, "Holy crap, that person is so fat, its like lava flow!"
by bluelabel June 10, 2010

The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

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The Urban Dictionary Mug

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

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt