Werdz
In Canada, a beanie is called a toque. In New Zealand, an esky/cooler is a chilly bin. In South Africa, a set of traffic lights is known as a robot. And in Heinlein's "Stranger In A Strange Land", to grok something is to understand it.
Among a few friends of mine, an overpowered hero/weapon/spell, etc. is described as being imba. I've never heard anyone else use that term, but a Google search reveals its presence in the Urban Dictionary with an equivalent definition.
Speaking of meaning, don't look for any in this blog entry :-)