ba ba ba ba penuts - You say it when someone talks too much and you want to punch

You say it when someone talks too much and you want to punch them but you just say this instead

'I'm going to be a billionaire!' 'Ba ba ba ba penuts.'

'I just got a perfect score!' 'Ba ba ba ba penuts.'

'I'm the most popular kid in school!' 'Ba ba ba ba penuts.'