let slip

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Godfrey said to himself again and again, that if he let slip this one opportunity of confession, he might never have another; the revelation might be made even in a more odious way than by Dunstan's malignity: she might come as she had threatened to do.
Tell me, senor, do you mean to travel all that way for nothing, and to let slip and lose so rich and great a match as this where they give as a portion a kingdom that in sober truth I have heard say is more than twenty thousand leagues round about, and abounds with all things necessary to support human life, and is bigger than Portugal and Castile put together?
It was not without some surprise that I found myself obliged to entertain this view of the case; Pelet, with his old -established school, was so convenient, so profitable a match --Zoraide was so calculating, so interested a woman--I wondered mere personal preference could, in her mind, have prevailed for a moment over worldly advantage: yet, it was evident, from what Pelet said, that, not only had she repulsed him, but had even let slip expressions of partiality for me.
said Porthos: and he puffed and blew like the conger which D'Artagnan had let slip from his hand.
The tall, light-haired young man retreated a step; but the two curious maidens had no mind to let slip their prize.
Whilst she played and sang, she thought over what Sir Charles had just let slip.
Contempt for the outburst of miserly gratitude of which he was the object; triumph in the sense of successful conspiracy against a man who had rated the offer of his protection at five pounds; regret at the lost opportunity of effecting a fine stroke of moral agriculture, which his dread of involving himself in coming consequences had forced him to let slip -- all these varied emotions agitated the captain's mind; all strove together to find their way to the surface through the outlets of his face or his tongue.
The youths who, until now, had detained the hounds, let slip the thongs of skin, by which they had been held, and urged them to the attack by their voices.
Now I ask you, my dear sir, not only as your legal adviser, but as your very true friend, will you let slip the occasion of attaining all these objects, and doing all this good, for the paltry consideration of a few pounds finding their way into the pockets of a couple of rascals, to whom it makes no manner of difference, except that the more they gain, the more they'll seek, and so the sooner be led into some piece of knavery that must end in a crash?
The good man has no doubt let slip something on that subject also, though mother would deny it: 'I shall refuse,' says she.
As none such is on record, it is safe to assume that none existed Tradition,--which sometimes brings down truth that history has let slip, but is oftener the wild babble of the time, such as was formerly spoken at the fireside and now congeals in newspapers,--tradition is responsible for all contrary averments.
He could never let slip an opportunity of making a bargain.