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Be Right Back Going to The Fridge To Get A Beer
an expansion on brb, where you give a valid reason for letting others wait a few more seconds.

Mostly used in online gaming, where beer and pretzels are widely accepted, but being late isn't.
Can be used for any other drink (pref. alchoholic), or snack.
Just a quick reminder for everyone that your readying yourself for a long playing session.