Could stand for "John Daily" or "Just a Douche" or BOTH!
A published report on Foxsports.com details a lawsuit logged by Daily against (among others) the PGA Tour and Children's Healthcare Charity. Nice guy.
From the Palm Beach Post;
The 44-year old golfer, whose money troubles are such that he often tweets about signing merchandise for cash in rural Mississippi, filed the suit two years ago after a woman jumped in front of him mid-swing at the Honda
Daly blames the injury for his absence at several subsequent tournaments.
I'm sure the heavy drinking, getting kicked out of Hooter's, multiple divorces can all also be blamed on someone... JOHN DAILY. As disconcerting as it may be for John to do the suggestion is to buy a mirror and sue the person he sees on the other side for his troubles because that's the ONLY person there is to blame here.