RMB stands for - Rolling my brain. It’s taking rolling your eyes to the extreme. When someone says RMB they are so done with the subject/situation that their brain is literally cringing and rolling back.
Argh this creepy guy won’t stop messaging me, RMB!
This chick won’t stop preaching to me, jeeze RMB.
You like long walks on the beach? So boring, RMB.
