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Published 12:12 20 Apr 2016 BST
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Now, Mary's on Wicklow Street in Dublin are offering free toasties all day to mark the momentous occasion. All you have to say is "thanks for the cheese" to bag your free toastie.I have decided to retire young. Thanks for the cheese. Catch ya's later.
— Conor McGregor (@TheNotoriousMMA) April 19, 2016
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