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3.
An individual who drives any vehicle at excessive speeds.
Little Ricky Racer loves to drive his ricer in the triple-digit domain... he's the epitome of the fast & furious speed freak!
by Gapingredgroovie January 07, 2009
 
1.
someone hopped up on amphetamines
"What's wrong with that guy? His eyes ar popping out of his skull and he's shaking!"

"He's a speed freak!"
by Nasty Nate August 22, 2003
 
2.
(SPEED freak) n. a drug addict who is always high on crystal or methamphetamine syn: tweaker, meth head, sketcher
Dude: Yo, wtf is up with Sue? Is she always spun?
Other Dude: Fuck yeah man, she's a speed freak.
by Nedd Ludd August 23, 2005