And ''night-night' and 'daddy' were two-year-old language to Jim.
night-night, echoed Ted, as he wiggled his fingers in a funny fashion at Trouble.
"Just a little peep at dainty Miss Mission, to say night-night," he smiled, unfastening the catch on the chronometer case.
nursery talk, "good-night," 1896; form nighty-night is attested from 1876.
An amiable parting salutation at night (1896+)