Bladder mouth?

After Melissa had let slip a major plot development in the Season Finale-Numb3rs, 3rd Season, awesome- , David and Eliza called Melissa a "Blabber mouth," because I hadn't seen it yet. She started crying and tried to yell at them for calling her a "bladder mouth"-Where am I during all this? I'm the Innocent Bystander.-But I cut in, "Whoa, bladder mouth??? That's  even worse than 'Potty Mouth!' And THAT is an an altogether different subject."