What is "speed freak"

n. 1 (context idiomatic slang English) (alternative spelling of speedfreak English) 2 (context idiomatic slang English) A person who enjoys driving, riding motorcycles, etc. at high speeds.

n. addict who habitually uses stimulant drugs (especially amphetamines)

Speed Freak is a monochrome vector arcade game created by Vectorbeam in 1979. Along with Ataris' Night Driver it is one of the earliest first-person driving games and the first such game known to use vector graphics.