also ‘to be all thumbs’—to be extremely clumsy (i.e., lacking in manual dexterity)—19th century—variants of the original phrase ‘each finger is a thumb’, already proverbial in the mid-16th century
1546—originally designated the period of time following a wedding, and arose from the comparison of the mutual affection of newly-married persons to the changing moon, which is no sooner full than it begins to wane
children are inclined to eavesdrop; used as a warning (“children are listening”)—USA, 1901—perhaps a modification of synonymous ‘little pitchers have big ears’
1711 in a letter by Jonathan Swift—perhaps from Ecclesiastes, 10:20: “a bird of the air shall carry the voice; and that which hath wings, shall tell the matter”
late Middle English—early form of ‘Bethlehem’, originally referring to the Hospital of St. Mary of Bethlehem in London, used as an institution for the insane
Origin: for purposes of fasting, food was divided into categories – ‘fish’, the flesh of fish, ‘flesh’, the flesh of land-animals, ‘fowl’, the flesh of birds.
This phrase is a transformation of ‘one’s head full of bees’, meaning scatter-brained, unable to think straight, as if bees are buzzing around in one’s head.