O BLAARGAGG!?!
When you're so lost in thought you forget your own name and you just yell 'O BLAARGAGG?!?,' then cry.
Mom: 'What's your name?' Me: 'O BLAARGAGG?!?'
Friend: 'Who are you?' Me: 'O BLAARGAGG?!?'
Principal: 'What's your name?' Me: 'O BLAARGAGG?!?'