Gabbling
When you know someone is eavesdropping and you talk like you're giving a speech to a crowd of rich people who just paid you to be loud.
"I’m not yelling at you, I’m giving a TED Talk," he said, while whispering to the guy behind me.
"You think I’m talking to you? I’m talking to the whole damn café," she said, pretending I wasn’t there.
He was so full of himself, he didn’t realize the whole pizza place was listening to his rant about his ex.