Big-Fech Share definition Flag An extremely large human being with beautiful golden locks. Commonly is confused with big bird from sesame street. "Woah did you see that big yellow bird?"- John"Yeah, but that was just a big-fech"- Sally Big-Fech by Tavid Johnson January 30, 2010 0 0 Get merch Get the Big-Fech mug. Buy Now — $32.95 See more merch