This definition appears very rarely
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- Slang/chat, popular culture
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Samples in periodicals archive:
THE annals of Twitter fails are vast (recent example: when actor Warwick Davis tweeted thanks for luggage he'd be given by a brand during the Remembrance Day two-minute silence), but the latest is a corker.
epicfail -- the worst Facebook, Twitter fails of 2013
Women standing up to abuse should not fear having their accounts cancelled because Twitter fail to see the issue at hand.