BFG Have Mercy T-ShirtAll About the BFG Have Mercy T Shirt Billy F Gibbons is known for many things the leadman for ZZ Top, his legendary guitar skills, the world's most recognizable beard, and his signature tagline, "Have Mercy." We leaned into that with the design of the BFG II, our newest boot, with his famous saying stitched right on the back of the heels of the boots. There is no better way to represent Billy and the BFG II, than by wearing "Have Mercy" across your