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Pejin, Pee-in.

A name associated to people who believe, no matter the evidence they are correct and will deny their failure till the end. This word is, in most cases, used in the sentence "pulling a Pejin".
After a man incorrectly fills out paperwork, yet denies it was him, he is 'pulling a Pejin'.

A man who is caught on camera stealing from a bank, yet denies it was him. Such a Pejin.
by General of Secrets April 04, 2013