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.
FRIDAY-FACE
Meaning of FRIDAY-FACE in English
Slang English vocab. Английский сленговый словарь. 2012