adj. and subs. (common).A hairless countenance. See quot. 1823.
1777. ISAAC JACKMAN, All the Worlds a Stage, i. 2. Master Charles, who is that gentleman? Hes acting, isnt he? Has he a MUFFIN-FACE?
1823. BADCOCK (Jon Bee), Dictionary of the Turf, etc., s.v. MUFFIN-FACEDone who has large protruding muscles on his phiz, which is pale withal, is a MUFFIN-FACED son of a ; mostly cooks, idle gourmands, &c. who delight in fat, soups, and slip-slops, evolve mutton-faces.