GMac 

Named after the short but tenacious Syracuse point guard Gerry McNamara, a GMac is any inprobable clutch or momentous action a person pulls off, usually at the last second.

I can't believe Tom pulled that test grade out of his ass -- that was a total GMac.

GMac by tmck1352 December 13, 2006

gmac 

a gaysha person who wishes he was chris brown. has a chode, has small arms, and has no game at all. only gets guys, not girls. gives blumpkins, and loves to give an alabama hot pocket.

yo look, its gmac

gmac by gaysha123456789 March 31, 2010

GMAC 

Acronym for “Give me a call”

Ok, gmac when you’re done.

GMAC by Pem Mcflum October 26, 2017

GMTL (GMacTheLit) 

One of the best SoundCloud rappers rn. His songs are hype as fuck. Sometimes he caps a lot so sometimes people call him GCapTheLit or GCapTheHair (he used to have a lot of hair). Other nicknames include GCapTheCrustyLips (his lips used to be VERY crusty because of his accutane), and (part of this nickname is redacted for privacy reasons) GCap______IsSoChill (because GMTL thinks this person is SOOOO chill!)

Yo u hear that new GMTL (GMacTheLit)? GMTL you know the voice make these girls faint like they heard the word moist when I get bands imma drive a rolls Royce, yes I saw when cause I don’t have a choice.

GMTL (GMacTheLit) by ulotcheeky October 1, 2021

Gmac5000

A vertically challenged and scottish minecraft streamer from france. Whilst he may not be good at any game whatsoever he is still enjoyed by many twitch viewers.

Look at that tiny man. Oh its Gmac5000

Gmac5000 by cosevie September 4, 2021

G-Mac 

Chill out or calm down (in a gangster way)

"Qwan u otta G-Mack breh, 'fo u stole off on that nigga"

G-Mac by Rocko Skarphone 2 March 25, 2009

gmacking 

To chill

Yo me and Chris are gmacking at my house

gmacking by ChinnieexC December 27, 2009