‘dillbrain’: meaning and origin

Australia, 1943—a foolish or silly person—from the synonymous noun ‘dill’ (1933), itself apparently a back-formation from the adjective ‘dilly’, meaning ‘foolish’, ‘silly’

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‘to put one’s skates on’: meanings and origin

to hurry up (1849 in Charles Dickens’s David Copperfield); the image is of a skater gliding rapidly over an ice surface—also, in early use (USA, 1886): to get drunk; the rolling gait of a drunk person is likened to the swaying motion of an ice skater

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‘sneaky-beaky’: meaning and origin

an intelligence operative, also an intelligence operation—UK, 1966—from ‘sneaky’ (furtive, deceitful) and ‘beaky’ (referring to an overly inquisitive person, with allusion to a prominent nose)

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‘(as) thick as a brick’: meaning and origin

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’

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‘mugshot’: meaning and origin

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)

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‘sleeping policeman’ | ‘gendarme couché’

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

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