BG. It's emblematic of someone who is a pure boss and fucks bitches. It is based upon a Florida Highschooler some years back who graduated valedictorian of his high school, played 3 sports, and had the hottest piece for a gf. It has since gained widespread popularity at many Florida State Schools.
That guy is so fucking BG - he fucked the hottest girl in KD and wrecked the curve in his graduate student class.
you know how you play "slug bug what color" when your extremely bored or if you just want to hit your friend, BG is a similar game in which you most commonly use in church to identify a BG or Bald Guy them following with a punch to the shoulder toward his friend.
Other words may be:
FG- Fat Guy
UG- Ugly Guy
SG- Stupid Guy
RG- Retarded Guy
HG- Hairy Guy
MG - Mutated Guy
and so on
person 1:BG (following with a punch toward his friend)
person 2:WHAT THE HECK!??