Slang; noise used typically in chat randomly for no apparent reason.
<bob> hello
<frank> grt grt~!!!
by outlaw55 July 24, 2003
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adv. Being high as shit, attainable through the prolonged use of marijuana. Refer to the eyes for further verification of the act of being grt.
Dale you are so fucking grt, kid.
Dale, did you get grt as shit today?
Wait, wait, look at me. Yeah, you're grt as shit.
by Amber Michelle Lewis May 17, 2007
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Gypsy Roma and Traveller: Gypsies, Roma and Travellers are often categorised together under the “Roma” definition in Europe and under the acronym “GRT” in Britain.
Oh look, she’s a GRT.
What’s that?
A Gypsy Roma Traveller.
by milkpeach February 11, 2022
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"grt" short term for GRRRRRRRT, a machine gun. "bah" short term for BAHHH, a loud noise let of by a big cal gun.

Usually used by hood niggas to show they they really be bangin on the streets
AY BRO I PULLED UP ON EM, WENT STRAIGHT GRT BAH ON THEM NIGGAS FIYTB
by Big T 2k2k2k January 28, 2023
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Short for 'Great Replacement Theory', it is a conspiracy theory perpetuated by racist white people to justify their racism, claiming that people of color want to 'replace' them.

Also see: racism, bullshit, fake, untrue, completely false, FOX News, Tucker Carlson, ReTrumplican
GRT is utter bunk and everybody with a functioning brain, mind, and moral compass knows it.
by ThatGuyWhoWatchesVideos May 16, 2022
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HOW GRT ARE U
by QueenAngleLove October 26, 2020
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