Acrynym for "Good Bye Cruel World!". Often found on blogs or forums when a member disagrees with a particular subject matter to such a degree that they decide to leave the forum/blog forever. In doing so, they often feel compelled to leave a last message explaining why they feel so wronged/slighted and how they will never post again -- this is the GBCW message.
Jerry left a GBCW on the forum after some members disagreed with his stance on abortion.
by Tarindel November 14, 2005