not likely

Not likely.

Inf. That is probably not so; that probably will not happen. Mary: Is it possible that you'll be able to fix this watch? Sue: Not likely, but we can always try. Sally: Will John show up on time, do you think? Bob: Not likely.
See also: likely, not

not likely

People say not likely as an emphatic way of saying no, especially when they are asked to do something. Clear up his mess for him? Not likely!
See also: likely, not
References in classic literature ?
My dear Mother,--I am very sorry to tell you that it will not be in our power to keep our promise of spending our Christmas with you; and we are prevented that happiness by a circumstance which is not likely to make us any amends.
Macey observed, "Folks as had the devil to back 'em were not likely to be so mushed" as poor Silas was.
I am not likely to forget anything you say at this our last parting.
I rather think you are mistaken, for when I was talking to her yesterday of getting a new grate for the spare bedchamber, she observed that there was no immediate hurry for it, as it was not likely that the room would be wanted for some time.
The fact that he had been neutral in the death-struggle of Athens was not likely to conciliate popular good-will.
It is not likely you should ever have observed him; but he knows you very well indeedI mean by sight.
exclaimed Paul, thrusting his hand into his shaggy locks, like one who thought it prudent to hesitate before he undertook so formidable an adventure; "now, heark'ee, old trapper; I've stood in my thinnest cottons in the midst of many a swarm that has lost its queen- bee, without winking, and let me tell you, the man who can do that, is not likely to fear any living son of skirting Ishmael; but as to meddling with dead men's bones, why it is neither my calling nor my inclination; so, after thanking you for the favour of your choice, as they say, when they make a man a corporal in Kentucky, I decline serving.
Lorry, striking in to explain; "there are frequent risings in the streets; and, although it is not likely they will ever trouble you, Madame Defarge wishes to see those whom she has the power to protect at such times, to the end that she may know them--that she may identify them.
Weston, 'I want to bid you good-bye--it is not likely I shall see you again before you go.
go to law with him is not likely to pay off his mortgages, especially if he enjoys the good opinion of acquaintances who want to borrow a hundred pounds on security too lofty to be represented by parchment.
But I'm not likely to get a glimpse of it if you don't go with the professor.
That a private gentleman should have such a machine at his command was not likely.
Still it was well understood that Adrienne was not likely to marry, her birth raising her above all intentions of connecting her ancient name with mere gold, while her poverty placed an almost insuperable barrier between her and most of the impoverished young men of rank whom she occasionally saw.
As it formed, therefore, a convenient highway, and ran in a proper direction, they turned into it, and determined to keep along it as far as safety would permit: as the Crow encampment must be some distance off, and it was not likely those savages would return upon their steps.
Chanticleer observing that they were but thin fellows, and not likely to take up much room, told them they might ride, but made them promise not to dirty the wheels of the carriage in getting in, nor to tread on Partlet's toes.