Take The Mickey Meaning

(intransitive, Britain, slang) To ridicule or mock.

Example:   Are you takin' the mickey? You'll get yer 'ead bashed in.
2008, The Age newspaper, Who's laughing now?, by Kenneth Nguyen
  For the last eight years, taking the mickey out of George Bush has been great, victimless fun. Like taking candy from babies or shooting aquatically-challenged fish in size-challenged barrels.