Not a logo about a disability. It's a flex.

A C4–C5 spinal cord injury took the movement out of Terrell's hands — all ten fingers still there, just curled up tight, none working like they used to. So he built his own controls: the back of his left hand on the stick, his right thumb, his right middle finger. Three points. That's the name — Three Fingers, Finally Functioning. Finally functioning, fully on fire.