Top Definition
A twibbon is like a bumper-plate sticker for your twitter avatar.

A twibbon is used to promote a cause on twitter by overlaying an image on your profile picture to show your allegiance to the twibbon cause.

A twibbon cause can be anything from a protest, memorial, event or even a popular person or band.

Twibbons can be created and supported on: to support the fight against terrorism in Indonesia to remember Jackie, a New Kids on the Block fan to support the band McFly to show you'll attend the Wine Bloggers' Conference
by Jonathan Joyce July 20, 2009
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