A fork of Rural Dictionary
A "generally bad idea" - something that is highly inadvisable or to be avoided at all costs.
Rewiring an electrical outlet with the power still on is a GBI. Sending your bank account login details to a stranger is a GBI.
God-Blessed Independent. A nicer name for someone who is not a member of a greek organization on a college campus.
Person 1: You must be a frat guy. Person 2: Nope. I am a GBI!