monging
n.β Β«Sunday face originally referred to a righteous or sanctimonious facial expression, worn at or after church, or just generally.…Now it is used in the UK to refer to an almost total lack of facial expression, typically on a Sunday. This is the face of someone whoβs “monging out” (lazing or coming down) after getting slantered.Β» ββWhatβs the word: Sunday Face” Observer (U.K.) July 3, 2005. (source: Double-Tongued Dictionary)