very stupid—popularised by Jethro Tull’s ‘Thick as a Brick’ (1972), but already existed—in early use (19th century) applied to nouns such as ‘skull’ and ‘head’, used metonymically for ‘intelligence’
U.S. slang, 1935—a photograph of a person’s face, especially in police or other official records—from ‘mug’ (a person’s face) and ‘shot’ (a single photographic exposure)
a raised band across a road, designed to make motorists reduce their speed—1961—based on the image of a policeman lying asleep in the middle of a road—in early use often with reference to Jamaica
absenteeism among police officers (and by extension other workers) who claim to be ill but are in fact absent to support union contract demands or negotiations—USA, 1967—alludes to the traditional colour of police uniforms
in French contexts: a young person, especially a young man, belonging to a youth subculture of the 1950s and 1960s—UK, 1959—from the noun ‘blouson’ (a short jacket) and the adjective ‘noir’ (black)
UK, 1804—literal meaning: a robbery committed during daylight hours, often characterised as particularly conspicuous or risky—figurative meaning: blatant and unfair overcharging or swindling
UK, 1972—the nouns ‘granny-bashing’ and ‘granny-battering’ denote: a) the assault or mugging of elderly persons; b) abuse of an elderly member of one’s family, especially one’s grandmother
Australia, 1933—an addict of cheap wine or/and of methylated spirits—apparently coined jocularly after ‘Wyandotte’, denoting a domestic chicken of a medium-sized American breed