On The Origins, Use, And Meaning Of "Ass In The Jackpot"
by Timothy Burke from Deadspin > Sports News Without Fear, Favor or Compromise on (#3TB8H)

The emergence last month of a 2016 video featuring mic'd-up Terry Collins arguing with umpire Tom Hallion not only gave the world, if only briefly, a unique insight into how umps deal with enraged managers, but also its most prominent demonstration of a phrase that was, until that point, known by only a small, niche"