In the phrase ‘sleep tight’ (USA, 1873), the adjective ‘tight’ is used as an adverb meaning ‘soundly’, i.e. ‘deeply and without disturbance’, as in the combination ‘tight asleep’ (USA, 1847).
meaning: ‘there is nothing to prevent someone or something from being successful’—from a late-19th-century metaphor specifically used of poker games with ‘a sky-high limit’ on stakes
meaning: ‘thoroughly dejected or disappointed’—appeared (1973) in Tyne and Wear (north-eastern England)—originated apparently in football parlance, in which it soon became a cliché
UK, 1857—characterised by savage violence or merciless competition—from Alfred Tennyson’s poem ‘In Memoriam’ (1850), in which ‘red in tooth and claw’ refers to Nature’s brutality
UK, 1835—mischievous or deceitful behaviour—alludes to the proverbial playfulness of monkeys—probably modelled on Bengali ‘bãdrāmi’; cf. modern Sanskrit ‘vānara-karman’, from ‘vānara’ (monkey) and ‘karman’ (action, work, employment)
USA—‘to look, or to feel, (like) a million dollars’, or ‘(like) a million bucks’: to look, or to feel, extremely good, or extremely attractive (early 20th century)—sometimes used in contrast to ‘like thirty, or 30, cents’: cheap, worthless (late 19th century)
‘the milk in the coconut’: a puzzling fact or circumstance; alludes to the question of how the milk got into the coconut—of British-English origin (1832), not of American-English origin as stated by the Oxford English Dictionary
USA, 1901—Especially in ‘to have them rolling in the aisles’, the colloquial phrase ‘in the aisles’ is used in various expressions to suggest a wildly enthusiastic reaction, especially uncontrollable laughter, on the part of an audience.
UK, 1832—‘the awkward age’: the adolescence, when one is no longer a child but not yet properly grown up, a time of life characterised by physical and emotional changes—translates in French as ‘l’âge ingrat’, ‘the thankless age’
USA, 1850—indicates that precedence should be given, or deference shown, to an older person—in extended use: an invitation to somebody (not necessarily older) to go first when passing through a door, etc.—pays a compliment to the person giving precedence