1 definition by Dr. Rockstar

Gaand mara bro. It is used to tell an annoying person to fuck off, in Indian subcontinent. It is also a terminology used by a close group of friends to subtly denote each other to cut the crap in a friendly manner.
Darshan: Hey bro! What were you doing at 3am in the night ?
Harsh: GMB man. Fuck off.
by Dr. Rockstar June 7, 2020
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