shoutburst
A shoutburst is a shout and an outburst combined. It generally means someone who is acting so immature and is shouting so incredibly loud that absolutely everyone around can see and hear them. A total meltdown. It is not a short angry burst but a long and loud one with a lot of whining and screaming. It really brings a lot of negative attention to the person who is doing it.
"Did you hear about Stacy the other day when Kathy took her lipgloss ?"
"Boy did I ! She had a full 30-minute shoutburst ! People flocked all around to watch and record it on their phones."
"Boy did I ! She had a full 30-minute shoutburst ! People flocked all around to watch and record it on their phones."