An annoying girl who acts cute and dumb but is in reality manipulative and highly untrustworthy. Usually an attention seeking person who craves the spotlight and is prepared to lie and deceive her way to it. Enjoys deception and conflict if it means more attention is focused on her and she gets to play the victim.
'She told everyone my secret, such an Izzie.'
'She sent herself a valentines card, what an Izzie thing to do'