brbigp Share definition Flag An Instant Messaging slang abbreviation meaning "Be Right Back, I Gotta Pee" -Yo, sup? -brbigp -Ok, I undastand, i had to yesterday real bad! brbigp by Seth Vicious September 21, 2004 0 0 Get merch Get the brbigp mug. Buy Now — $32.95 See more merch