BFUN is a new bridge bidding system designed to reduce the guesswork caused by flaws in standard bidding systems. The focus is on conveying immediately whether opener's hand is balanced or unbalanced. Much of the complexity of most standard systems is made necessary by failure to make this distinction. BFUN allows players to drop a multitude of conventions which exist only because of this fundamental flaw. BFUN introduces several new and revised conventions to take advantage of what the author argues is a more stable foundation for bidding.