Australia, 1934—an inexhaustible supply of something, especially money—alludes to The Magic Pudding (1918), by Norman Lindsay, in which a pudding instantly renews itself as it is sliced or eaten into
USA, 1946—a feeling of regret experienced after making a purchase—also, in extended use: a feeling of regret experienced after voting for a particular person or programme
UK, 1958—a type of moustache in which the two ends extend downwards to the chin—refers to Emiliano Zapata, who was portrayed with a moustache of this kind by Marlon Brando in Viva Zapata! (1952)
1975 as ‘French chef’s kiss’—a gesture used to indicate that something is excellent or perfect—also a perfect or excellent person or thing—alludes to such a gesture stereotypically made by a chef on tasting a delectable dish
a makeshift incendiary device for throwing by hand, consisting of a bottle filled with flammable liquid and with a piece of cloth as a fuse—Finland, 1940, in reference to Vyacheslav M. Molotov, who led the Soviet campaign against Finland
Canada, 1857: an angelic being imagined as being the source of a fall of snow—USA, 1893 (?): an impression in the snow resembling an angel, made by lying on one’s back and moving one’s arms and legs back and forth in an arc along the ground