circumlocution — the use of many words where fewer would do, especially in a deliberate attempt to be vague or evasive

a nervous businessman stands at a whiteboard drawing endless circles and arrows while gesturing wildly with his hands. He points to multiple complicated diagrams and flowcharts that make a simple concept look extremely complex. His colleagues sit around the table looking increasingly confused and frustrated as they check their watches. One person rubs their forehead while another yawns and taps their pen impatiently. The presenter continues adding more unnecessary details and connections to his already overcomplicated explanation. the use of many words and elaborate explanations where fewer would do, especially in a deliberate attempt to be vague or evasive