(NOUN) The art of being a tactless; womanising, geekish, sped.
Did you see that totally hot guy, jenny?
No way...he was a total Gwilliams
by Rebecca April 10, 2008

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Top Definition
The act of kicking someone in the balls with a great amount of strength, often resulting in death.
"Wow, he just totally hit Dennis with a Gwilliam!"
by Grand Master Young February 10, 2009

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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.

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.

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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