It's what ignorant police and newscasters say to sound important when they should really say "speed", as in " the car was traveling at a high rate of speed."
These people will often say " at this point in time" rather than "now. "
Synonyms for rate of speed
On this page, you will find 30 slang terms related to rate of speed. Some of the top words include: lemme get it, dot commerce, super neck, fuckshitfuckshitfuckshit, gouranga, and 25 more.