Obamasplain
Explaining a concept in an excessively high-minded and round-about way so as to leave the listener exhausted, confused and hopefully prevent he/she from asking follow up questions.
When Julie asked the car salesman how a bigger vehicle with a bigger engine could get the same mileage as a smaller vehicle with a smaller engine, the salesman Obamasplained that the question was not relevant to the purchase.
Obamasplain
The act of explaining a concept in an excessively high-minded and round-about manner so as to exhaust, frustrate and confuse a questioner into submission and preclude any follow up questions.
When Julie asked how a bigger vehicle could get the same mileage as a smaller vehicle with a smaller engine, the car salesman Obamasplained that the question was not relevant to the purchase.