noun
a person who is addicted to or obsessed with speed, especially in the context of driving or racing
-
The police officer apprehended the speed freak for driving recklessly on the highway.
-
I heard that John is a real speed freak when it comes to racing cars.
-
That guy is a total speed freak, always pushing the limits on his motorcycle.
-
She's a speed freak when it comes to finishing projects at work, always trying to get things done quickly.