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Short form of: "what are you on about". (What are you talking about). Takes the strain off the laden tongue by reducing 5 words and 6 syllables into 1 word and three syllables. Yon-a-bout. Often collocates with the insult crableg. Coined by Rt.Hon Sir Toby and Pleetka
Pleetka: Yonnabout Crableg!
by Sir Toby October 10, 2005
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