from the 16th-century phrase ‘to set cock a hoop’, ‘to set (the) cock on (the) hoop’, apparently meaning ‘to put the cock (= spigot) on a barrel hoop and let the liquor flow prior to a drinking bout’—‘cock’ later equated with the fowl and ‘hoop’ with French ‘huppe’ (tufted crest)
The phrase ‘all behind, like a cow’s tail’ and its variants mean ‘left behind’ and ‘late in accomplishing a task’. They appeared in print in the mid-19th century in the USA, Australia and Britain.
‘to take the Fifth’: to decline to reveal one’s own secrets—from ‘to take the Fifth Amendment’: to appeal to Article V of the original amendments to the U.S. Constitution, which states that “No person […] shall be compelled in any criminal case to be a witness against himself.”
‘Sydney or the bush’: all or nothing (1902)—based on the metaphorical opposition between an easy life in the city and a hard life working in the outback, this phrase was apparently originally used by people risking all on the toss of a coin.
‘dunce’: originally a follower of John Duns Scotus (circa 1265-1308), scholastic theologian; in the 16th century, Scotus’s system was attacked with ridicule by the humanists and the reformers as a farrago of needless entities and useless distinctions
UK, early 19th century—private property taken from an enemy in war—originally an Anglo-Indian noun, from Hindi ‘lūṭ’, from Sanskrit ‘luṇṭh-‘, ‘to rob’—came to be also used as slang for ‘money’ and to also denote ‘wedding presents’
The name ‘Quorn’ was first registered as a trademark—for certain edible products other than meat substitutes—by the Quorn Specialities Company of Leicester, England, in 1914. The meat substitute was subsequently developed by the successors of this company.
mi-17th century—probably from ‘hand in (the) cap’, used of a sort of game in which players put forfeit money in a cap and then drew from it—later applied to a race between two horses (the better of which carried extra weight), arranged by such rules
British English, first recorded, apparently as army slang, in 1945—probably from ‘bonk’ (= a blow on the head) and the suffix ‘-ers’ as in ‘ravers’ (from ‘raving mad’) and ‘starkers’ (from ‘stark mad’)
First recorded in 1694, ‘Peg Tantrum’ was chiefly used in the phrase ‘to go to Peg Trantum’s’, meaning ‘to go to one’s death’. This word is perhaps from ‘Peg’, rhyming form of ‘Meg’, pet form of the female forenames ‘Margery’ and ‘Margaret’, and from ‘tantrum’.