'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.
"Dam yo we would've won that game if it wasn't for that no IQ speedbooster, fuck!"
An alternate version of the word speeding, used chiefly by corporate whores, Wifeswap contestants and people with severe retardation (esp. sufferers of Angelman Syndrome).