Douglas Harper's Etymology Dictionary
Wiktionary
a. Like a piece of sing-song; simple and melodic, song-like. n. 1 A kind of verse with a simple, song-like rhythm. 2 (context colloquial often childish English) An informal gathering involving group singing.
Usage examples of "sing-song".
The innkeeper hailed him in a gruffy, sing-song manner, wrinkling his stump of a nose like a charging bull, and running a hand through his greasy hair to make it stick upwards in a haphazard manner, which he apparently thought made him handsome.
Then, looking down at the cat, she resumed her old, mocking, humorous sing-song.
Teresa was there, but he did not remember that dream, and he did not know that he dreamed of La Marquesa, and the dusk turned to darkness, night in Salamanca, and it should have been his last night in the wide black-curtained bed and he moaned on the palliasse and Connelley, half drunk, called in his sing-song voice for him to die well.
Literature can never conform to the dictates of pure euphony, while grammar, which has been shaped not in the interests of prosody, but for the service of thought, bars the way with its clumsy inalterable polysyllables and the monotonous sing-song of its inflexions.
Navaho Elixir International and Oriental Al Fresco Entertainments, with the Old Indian Doctor, who had a charming sing-song Swedish accent, making a violent ventriloquist melodrama with three puppets.
The Brummagem sing-song inlaid with suburban gentility scraped my nerves.
Ursula and Gudrun, both very unused, were mostly silent, listening to the slow, rhapsodic sing-song of Hermione, or the verbal sallies of Sir Joshua, or the prattle of Fraulein, or the responses of the other two women.
Sam felt hypnotised by the duet of their sing-song voices, first one, then the other.
This old sing-song had doubtless been handed down from the times when the labourers really did steal sheep, a crime happily extinct with cheap bread.
The travellers took their places in the carriage, and again the monotony of the road, the steady trot of the horses, the sing-song words of encouragement of their driver, monopolised the thoughts of sleepy minds.
So Babygirl tossed her shimmering cinnamon curls and prettily pouted, revealed her dazzling white smile, in a breathy sing-song she recited the sweet iambic verse she had composed for this very occasion.
Meg and Andrew, he saw, were standing side by side, facing the opposite side of the clearing, Andrew furiously shaking his staff and bawling out his Latin, while Meg waved her arms in cabalistic gestures and cried out a high sing-song of words so twisted and kinky that they seemed to Duncan, listening to them, to be beyond the range of human tongue.
When he read from his clipboard, it was in the sing-song voice of someone who learned his public speaking at school.
And I hope I'll see you all on Tuesday for the sing-song and sausage sizzle.
It also sometimes happened that a very small herdboy, who did not feel any responsibility about the goats, would come back in the early morning all by himself, stand for a long time in front of the clock, now shut up and silent, and address it in Kikuyu in a slow sing-song declaration of love, then gravely walk out again.