flight of ideas
a rapid flow of thought, manifested by accelerated speech with abrupt changes from topic to topic: a symptom of some mental illnesses, especially manic disorder.
What Is Whisky Tango Foxtrot And Other Army LingoGiven the size and manpower of the US Army, it's no surprise that its lingo has gradually invaded everyday conversation. Not many of us keep a Purple Heart framed on our desk, though (i.e., we have no idea what these words and phrases mean even though we hear them all the time).
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019