Top Definition
The event where mushrooms, through an error in their natural biology, emit a caustic acid. This acid, although related to Caustic Soda use in refinieries, has the reverse effect of Caustic Soda. It is a rare phenomenon. The mushrooms has usually been exposed to a higher than normal dose of radiation or an irradiated substance. Irradiated fungicide will usually cause this. It is recommended that if you are to venture near these mushrooms, wear a radiation suit.
An example for Anticausticosis is not needed here.
by PHR4G November 04, 2008

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

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

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