An outburst of words often happens when someone blurs together their thoughts and speaks quickly.
When people are excited or nervous, they might start talking really fast without thinking about what they want to say first. This can lead to a bit of a mess, with words tumbling over each other in a confusing way. For example, imagine being at a party and suddenly someone blurts out a loud secret that was supposed to be kept quiet - it's not the most elegant situation!
To utter suddenly and unadvisedly; to speak quickly or without thought; to divulge inconsiderately — commonly with out.
Example: Please think about your reply and don't just blurt out the first thing that comes to mind.
