grandiloquence — A lofty, extravagantly colorful, pompous, or bombastic style, manner, or quality especially in language

an opera singer in elaborate costume gestures wildly with outstretched arms while singing with an exaggerated open mouth. His posture is overly dramatic with one hand on his chest and the other reaching toward the ceiling. The performance is so over-the-top that it becomes almost comical in its intensity. His facial expression shows extreme theatrical emotion that seems forced and artificial. The audience in the red velvet seats below looks bewildered by the excessive display. Some audience members exchange confused glances while others cover their ears from the bombastic performance. a lofty, extravagantly colorful, pompous style of expression