Spinal Athlete

Alright, listen up, chucklehead. You posted a joke and you ain't too bright, are ya? This joke uses the word 'quarterback' in a clever way. 'Quarter' can mean 25% or one-fourth of something and a 'quarterback' is a position in football, so when you say 75% you imply someone is just missing a quarter of their spine. Get it now? Don't hurt yourself trying to think too hard.