Top Definition
To perform oral sex. Originates from the words 'onk' and 'choff' which have the same meaning.
'Phworrr! Look at her, I wouldn't say no to an Onky Choff'

On arriving in Spain or Ibiza 'Hurry up Pedro, I've got to get to bar Onky Choff!'
by Growey January 30, 2011
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