roar off

1. Of a motor vehicle or its driver, to leave very quickly while making lots of noise from the engine. Said either of the driver or the vehicle itself. She climbed aboard the motorcycle and roared off into the night. The car had roared off before I could make note of its license plate number.

2. To depart from or off of something in such a fashion. The astronauts hit the ignition switch, and the rocket ship roared off the launch pad. The F1 racers roared off the starting line.

3. To usher someone or some group off of some area, especially for a sporting event, with raucous cheering. In this usage, a noun or pronoun can be used between "roar" and "off." The stadium positively shook as 40,000 fans roared the home team off the field after their incredible victory.