UK, 1741—all day, incessantly—also, in early use, ‘morn, noon and night’—different from the juxtaposition of the nouns ‘morning’, ‘noon’ and ‘night’, which refers to an action taking place first in the morning, then at noon, and finally at night
1762—(especially of an ancient style of writing): having alternate lines written from left to right and from right to left—from the Greek adverb ‘βουστροφηδόν’, meaning literally ‘as an ox turns (in ploughing)’, with allusion to the course of the plough in successive furrows
USA, 1898—a view as seen from below or from a humble position—refers to a view taken as from the standpoint of a worm, i.e. from ground-level—coined after ‘bird’s-eye view’ (1782), denoting a view of a landscape from above, such as is presented to the eye of a bird
USA, 1937—an uneasy sensation felt, especially in the stomach, as a result of nervousness or apprehension—based on the notion that the fluttering of butterflies may produce a similar sensation
USA, 1853—in a panic-stricken and unthinking manner—alludes to the phenomenon whereby a chicken can move about for a short time after decapitation, due to reflex activity of the nervous system
Australia, 1919—an excess of effrontery—puns on two meanings of ‘hide’ (the skin of an animal – effrontery) and refers to ‘Jessie’, the name of an elephant that was kept in the zoological gardens of Sydney, New South Wales
USA, 1936—the facts about sexual reproduction, especially as explained to a child—when this phrase appeared, ‘birds’ and ‘bees’ had long been commonly paired in literary allusions
USA, 1855—used of a situation in which it is difficult to distinguish cause and effect—refers to the traditional problem of which came first, the chicken (to lay the egg) or the egg (to produce the chicken)
USA, 1977—to be mentally stable—usually depreciatively in negative contexts, as ‘not to have both oars in the water’—refers to the necessity of dipping both the oars into the water to keep a rowing boat steady and steer it in a straight line