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1.
The term '01' stands for 0121 do one, and is commonly used as a nice way of telling people to 'fuck off'. Generally '01' is followed by a derogatory term and is used by people who shorten almost every word in common tongue.
Person 1: "I might go for a drink tonight."

Person 2: " Just '01' then you mince"
by Bodders91 January 19, 2012