Top Definition
To do something brilliant, but have no-one around to see it. So therefore null and void.
I can't believe it, I did 2.6 million kick-ups with that flat rugby ball, however it was Gwagg.

I ran the 100 metres in 6.7 seconds, but it was Gwagg.

Gwaggin' hell! I just got 7 hole in ones in one round of golf, but as per usual its twattin' Gwagg!
by Dazma October 25, 2004

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