look up any word, like b4nny:
 
1.
Best Friends From the Galaxy or Garland. Bestest friends forever and ever better than the rest.
Ricardo and Liz are BffG's
by Chalulahhh May 12, 2010
 
2.
Big Fat F'n Gay. An expression used in fun to greet a close friend. Also used as a descriptive term.
Clous, you are a BFFG.
by Deavo April 07, 2011