To infer that someone's cognitive function is on the lower end of the spectrum by alluding to "Sped". Sonic is widely regarded as a very speedy character and sonic is an attempt to play on the word sped. Attaching Sonic to the brain means sped brain for lack of a better phrase.
*Plays game*
John: "Kill him, he is one shot."
Bob: *Misses every shot*
John: Do you have sonic brain?
John: "Kill him, he is one shot."
Bob: *Misses every shot*
John: Do you have sonic brain?
by Pogopawee March 19, 2021

A very quick masturbation
by Barbaros bloody December 23, 2019

Sink is an 'EXE' who doesn't fall under the typical standards an average EXE comes down to. He's not corrupted or possessed by some demon. He's simply just a Sonic who got caught up in a series of unfortunate circumstances. Battered and bruised, got himself caught inside the chains of an underwater mine, trapped with no air insight. He drowned and sunk to the bottom of the Labyrinth Zone. Due to his sheer willpower, he can somehow still 'survive' much to his dismay. He's essentially like a zombified sonic, trapped inside a never-ending state of pain, suffering, and loneliness. He doesn't know how long he's been trapped down there, endlessly waiting for SOMETHING that can save him from his agony. Days, weeks, years, decades. All he can do is wait in pain...
by YeetTheskeet22 May 17, 2022

A messed up version of Sonic. Also known as the blue Ugandan Knuckles, which means the also ask you whether you kno de wae, and serve the queen.
There go the Ugandan Knuckles and Ugandan Sonics.
by InDominus_ May 2, 2018

Sonic from Sonic Unleashed, the cool blue blur that likes ice cream and has a dumb ahh friend named Chip. He's kind and normal but when he turns super shit happen lol
He has drifting skills, singing skills and is just c o o l, he got a silly bracelet that he got obsessed with
Also apparentely he's also in Sonic Generations
He has drifting skills, singing skills and is just c o o l, he got a silly bracelet that he got obsessed with
Also apparentely he's also in Sonic Generations
by another stupid idiot on UD November 4, 2023

by SonicOmensHater August 14, 2022

by GizardWizard June 8, 2021
