grrat

Used by Kanye West in his album Donda, in the 14th track called Heaven and Hell released in 2021, used "Let it grrat" with the objective of mimicking a machine gun (AK-47) so there would be caos.

Therefore, grrat is the sound of any sort of gun.

Examples:
A: Imma grrat all these motherfucker
B: Let it grrat (Heaven and Hell , Ye )