I had a colleague from India who surprised everyone in the room with his casual usage of the word 'prepone'. As an Indian English-ism it means the opposite of

I had a colleague from India who surprised everyone in the room with his casual usage of the word 'prepone'. As an Indian English-ism it means the opposite of postpone, so it makes fairly obvious sense in that context. But no one else in the room had ever heard the word before, and the way everyones heads turned questioningly towards him as he uttered it, was memorable. In unison "did you say... prepone?" He had "preponed" his flight interstate since we'd finished half a day earlier than expected.