ETYMOLOGY
from bran (the husk of a cereal after grinding) + -faced
EXAMPLE
“…And for the rest, if any fuddling, bolus-brained, bran-faced, turnip-tongued, hippopotamus-headed moon-calf doubts my word, let him remember that there are pistols for two – and coffee for one, in Belgium, and let him tremble…”
From: Punch, Or The London Charivari
Vol. 98, 1890
In The Know (By Mr. Punch’s Own Prophet)
Lexicophilia 