It's a name (nickname, actually)* common among average white folks in the South. The Republican opposition attempted to use the moniker as a way of attacking him. It backfired badly. Clinton was far from a backwater hick, with an ivy league education and a law degree. read more
In the South, Bubba means Brother. It came from small children being unable to pronounce Brother clearly. It is a name of affection or endearment. Bill Clinton is a very socially gifted person and people are drawn to him. He is very charming, so the nickname came very naturally to him. read more
"Bubba" is brother in some places. Good ole' boys from the South can be called Bubba. The big scary prison rapist can be called Bubba. Take your pick. read more