In an interview, Ford blurted out that he spent billions in ads for his cars, but 'that mechanic' ended up on newspapers all across the world for free!
Adults with ADHD have many ideas and thoughts circling in their minds and they fear that they may forget their thoughts if they wait too long, causing them to blurt out things and interrupt discussions they engage in.
To blurt out something means to say something without thinking about the effect it will have and it's usually because you're nervous or you're excited.