A dismal countenance. Before, and even long after the Reformation, Friday was a day of abstinence, or jour maigre. Immediately after the restoration of king Charles II. a proclamation was issued, prohibiting all publicans from dressing any suppers on a Friday.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Fribble * To FrigNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes