'Spedistic' is an adjective. It is defined as dumb, special ed, and unintelligent. It can be a synonym for 'sped' or 'slow'. 'Spedistic' can describe a person, action, or thing.
Example #1:
You: "Why did you pour hot tea into a plastic water bottle?"
Your Sister: "I didn't think it would melt!"
You: "You're so spedistic!"
Example #2:
Your Friend: "Ms. Smith gave us extra homework because one person was talking!"
You: "Bruh she's literally spedistic!"
A speedbooster is a word used to describe the scum within the NBA 2K community that abuse dribble move animations to gain a speed advantage over their opponent. Speedboosters make up the majority of the highest ranked people in the NBA 2k MyPark, for their lack of actual basketball IQ gives them a competitive edge.
An alternate version of the word speeding, used chiefly by corporate whores, Wifeswap contestants and people with severe retardation (esp. sufferers of Angelman Syndrome).