look up any word, like cleveland steamer:
A "G" doesn't necessarily refer to a gangster. In Queens, among the individuals I'm acquainted with, a "G" is basically a person who has their "shit together"....or someone who is good at life, all around. An individual who is good looking, in good shape, is intelligent, has money, is good with people, is with hot women, is well dressed etc. is a "G." Therefore, the majority of the hip-hop/gangster community are not G's at all due to their lack of brains, money, social skill, class, style etc.
Lil' Wayne is not a G (due to him not being successful in all facets of life, eg. inability to conduct himself appropriately, lack of intelligence etc.).

Jay-Z is a G (high quality lyricism, money, Beyonce, style, class etc.).
by Pay Attention May 11, 2008
GHB or gamma hydroxy butyrate, a drug which causes alcohol-like intoxication and reduces inhibitions and increases libido; also known as the "date-rape drug"
He dropped a capful of g in her drink before he took her home; no doubt he had his way with her that night.
by Kent October 08, 2003
Plain and simple a Gansta
by DoWpEy April 19, 2003
$1000 or 1 gram of drugs; term for an unfamiliar male; Gamma hydroxybutyrate (GHB)
by Lehem October 18, 2003
Most of the words definitions related to 'g' all define it as gansta or something related to gansta culture. The original use of 'g' came from a divided sect of the Nation of Islam, this sect known as the 5 percent nation. It was originally used to promote a belief of godliness or god being a thing that could be achieved from within, and was used in the context of refering to members of the 5 percent nation, also know as the nation of gods. The HipHop group the Wu-Tang Clan commonly uses 'g' in this sense.
This is my 'G' from the Universal Nation of Gods.
by Smizzles May 15, 2005
1. Gangster

2. Glass (crystal meth)
1. What up G!?

2. Don't smoke G.
by GD November 28, 2004
Based on the bra cup sizes (AA, A, B, C, D, etc), a term for a girl or woman with large breasts.
He: Bob's girl friend is a G.
Friend: Meaning?
He: She has big breasts ....
Friend: You mean enormous and floppy?
No: No, just big and firm -- and great!
by ring-tailed roarer September 15, 2010