Biscuit-brained Share definition Flag Clueless or dimwitted. Term introduced on the Handyman for the Common Man web-only TV show. “Using a biscuit-brained approach will cost you more money and more time.” Biscuit-brained by The Handy Writer May 10, 2009 0 0 Get merch Get the Biscuit-brained mug. Buy Now — $32.95 See more merch