look up any word, like eiffel tower:
 
1.
Old gangsta
Sup old g Killer ray
by killer ray April 19, 2003
 
2.
1. old gangsta
2. a has been, worn out street fighter.
Yo, look at that Old G, he cant fight anymore, hes played out.
by Alz February 26, 2005
 
3.
The grandmothers of World of Warcraft players in Portage la Prairie, Canada.
Coffins had to go AFK when his Old G came to visit mid raid.
by lkb19 April 27, 2011
 
4.
old guy
watch out there is old g lookin at us
by Anonymous May 11, 2003
 
5.
The derogatory term "Old G" is usually used to describe an old woman.

It is an widely believed to be an abbreviated form of "old grandma" or "old ghastly".
"Hey look, it's two old G's!"
by HiTmAN December 26, 2003