sing


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sing

slang To provide incriminating information or evidence against someone or some group. Make sure that rat is at the bottom of the Hudson before he gets the chance to sing. Don't worry—he'll give us what we want. Just give us a bit of time and we'll have him singing like a canary.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

sing

in. to inform (on someone). (Underworld.) Rocko knew the stoolie would sing. He had to do something to stop her.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
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References in classic literature ?
It was the little living Nightingale, who, sitting outside on a bough, had heard the need of her Emperor and had come to sing to him of comfort and hope.
But now sleep and get strong again; I will sing you a lullaby.' And the Emperor fell into a deep, calm sleep as she sang.
'You shall sing whenever you like, and I will break the artificial bird into a thousand pieces.'
I will sit in the evening on the bough outside the window, and I will sing you something that will make you feel happy and grateful.
How she sings! I have permission to carry the scraps over from the Court meals to my poor sick mother, and when I am going home at night, tired and weary, and rest for a little in the wood, then I hear the Nightingale singing!
For he found that not only could he sing these verses, but he who had before been dumb and ashamed when the harp was put into his hand, could now make and sing more beautifully than could others.
For very long after they became Christian the Saxons kept their old pagan ways of thought, and Caedmon, when he came to sing of holy things, sang as a minstrel might.
The young men said it was the funniest song that had ever been written, and that, if we liked, they would get Herr Slossenn Boschen, whom they knew very well, to sing it.
They said nobody could sing it like Herr Slossenn Boschen; he was so intensely serious all through it that you might fancy he was reciting a tragedy, and that, of course, made it all the funnier.
He appeared to be quite pleased to sing it, for he came up at once, and sat down to the piano without another word.
Friend finally suggests that it doesn't matter what Harris is singing so long as Harris gets on and sings it, and Harris, with an evident sense of injustice rankling inside him, requests pianist to begin again.
And I - and I - Oh, well, we'll get on to the chorus, and chance it (SINGS):
In a few minutes they would be swarming the deck, for poor old Sing would be entirely helpless to repel them.
Running to the magazine she snatched up a feed-belt, and in another moment was on deck beside the astonished Sing.
The pirates were skimming rapidly across the smooth waters of the harbor, answering Sing's harmless shots with yells of derision and wild, savage war cries.