Top Definition
A mixture of the word "riddiculous" and the character "Rodolfus Lestrange" from the Harry Potter book series by J.K. Rowling meaning completely insane or outlandish. Possibly even too outrageous for any other word.
"Wow! Chris, from Haunted Mansion, is wearing the most riddonkulus hat!"
by Katie Forman February 08, 2006

The Urban Dictionary Mug

Lotsa space for your liquids.

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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.

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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
A mixture of the word "riddiculous" and the character "Rodolfus Lestrange" from the Harry Potter book series by J.K. Rowling meaning completely insane or outlandish. Possibly even too outrageous for any other word.
"Wow! Chris, from Haunted Mansion, is wearing the most riddonkulus hat!"
by Katie Forman February 07, 2006

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