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a phrase used to start fights by a group known only as the fountain boys, they use it loosely amongst each other however say it to make people angry, it implies that they have experienced a stink from your mothers vagina, the phrase has now spread to a much wider community, it is widely used in australia
a man walks up to a bar and says to the guy sitting next to him "your mum's cunt stinks"
by John Gould April 16, 2006
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