michael played mario kart for ten hours yesterday and got kart thumb - by the time he went home he couldn't even bend his thumb
kart thumb is a [wiinjury] that develops on the right hand after frequent and habitual use of [mario kart] using the [wii] wheel accessory while playing [mario kart] wii
"michael played mario kart for ten hours yesterday and got kart thumb - by the time he went home he couldn't even bend his thumb" What is the definition of "kart thumb"?