1950—‘grasshopper’ and its shortened form ‘grassy’, typically used in the plural, denote a tourist, especially a visitor to Canberra—the image is that a coachload of tourists is similar to a swarm of grasshoppers
to surpass everything—Ireland, 1821—probably refers to a strong military fort at Banagher, a town in County Offaly, in the province of Leinster, Ireland
China, 1849—extortion—from ‘squeeze’, denoting a forced exaction or impost made by a Chinese official or servant, and ‘pidgin’ in its original sense of business
UK, 19th century—‘red on the map’: the colonies and dominions of the British Empire—‘to paint the map red’: to expand the territory of the British Empire—from the colour used to represent British colonies and dominions on maps
UK, 1914—snobbish or supercilious—refers perhaps to ‘toff’, denoting a fashionable upper-class person—the image is perhaps of someone who, considering themself superior, keeps their nose high in contempt for the lower classes—cf. the form ‘toffy-nosed’ (1919)
UK, 1920—a group of three objects or persons—alludes to Pip, Squeak and Wilfred, a trio of animal characters featured in a children’s comic strip published in The Daily Mirror (London) from 1919 onwards