(Verb) Knowingly or recklessly obtaining or disclosing personal data or information without the consent of the data controller.
Blagging Example: A reporter for the Sunday Times posed as Gordon Brown on the telephone in an attempt to obtain his account details.
From the French Blaguer or Blague meaning to joke.
Person 1: My sister is Cassie.
Person 2: Really?!?!
Person 1: Nah, I'm just blagging.
To brag about something and it is a lie
tom 'Yeh did i tell you my dad knows 50 cent'
fred 'stop blagging'
To brag about yourself or something you did on your blog.
"Hey, did you read what happened to John the other day when he rescued that guy from the burning car?"
Yea... he was blagging about it"
Wasting time on the internet, i.e. surfing, checking email, facebook, etc.
John didn't socialize with anybody because he was too busy blagging on web forums.