Question

I can't believe I made the track team. After all, I have never been very athletic. In fact, my parents call me a couch potato. My coach, Mrs. Lopez, is very supportive and reminds me that if I work very hard I will be running at breakneck speed in no time.

What is the meaning of the underlined idiom?

Answer 1

The underlined idiom "running at breakneck speed" means running very fast or at an extremely high speed.