Vagina. (Etymology: Though "dillus" sounds like "dill," as in a variety of pickle, and therefore a potentially good name for a penis, its usage as a term for vagina came from a spontaneous Spoonerism of the name of actress Phyllis Diller. If that Spoonerism, "Dillus Filler," was defined as a term for a penis, then "dillus" must be a word for vagina.) Refer to the example for a handy way to remember its definition.
What does a dildo do? A dildo does dillus.
by revilot May 27, 2006

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Top Definition
A dillus is a very short and slender penis.
his dillus resembled a popscicle stick,
by megatron. August 26, 2009

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Your favorite word on a white mug.

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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.

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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