let slip

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let (something) slip

To accidentally or inadvertently reveal some secret or important piece of information. I can't believe your sister let news of our engagement slip in front of your parents! The agent, under the influence of a powerful truth serum, let slip the names of other operatives working covertly in the area.
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let something slip (out)

Fig. to reveal a secret carelessly or by accident. I didn't let it slip out on purpose. It was an accident. John let the plans slip when he was talking to Bill.
See also: let, slip

let slip

1. Also, let slip or slide by ; let slide. Miss an opportunity; waste time. For example, We forgot to buy a ticket and let our big chance slip by, or He let the whole day slide by. The first term dates from the mid-1500s, the variant from the late 1500s.
2. Also, let slip out. Reveal something, usually inadvertently, as in He let it slip out that he had applied for the vacant position. [Mid-1800s]
3. let slip through one's fingers. Fail to seize an opportunity, as in We could have won the trophy but we let it slip through our fingers. [First half of 1600s]
See also: let, slip

let slip

To say inadvertently.
See also: let, slip
References in periodicals archive ?
But in The Washington Post interview he let slip that he personally thinks Iran has that goal.
A few of the poems could have been cut to let slip the beauty of her life experiences.
Mr Blair, who became a father for the fourth time last May with the birth of his third son Leo, let slip his reluctance to have any more children during a General Election campaign tour visit to the Teesside Play and Education Resource Centre in Middlesbrough.
Moments before Ahmed successfully bid 875,000gns for a colt by Barathea, Mulhall let slip that Royal Anthem is close to retirement, although stud plans are in the process of being finalised for the injury-stricken colt.
Sun CEO Scott McNealy, able as always to spot a PR opportunity, let slip the name 'Corona' to analysts last week, and allowed himself to be gently chastised by his publicity department.
CNN, ever midul of literary precedent in White House matters, heard "dachshunds of war" and pondered if this could be a condign allusion to "cry 'Havoc]' and let slip the dogs of war"--the kind of thing regularly bruited about the green quadrangles of Yale.
HARRY REDKNAPP is not the first pundit or studio guest to let slip a naughty word with a slip of the tongue - and won't be the last.
YESTERDAY'S SOLUTIONS WEE THINKER ACROSS: 7 Flowers 9 Tiara 10 Ample 11 Let slip 12 Lot 13 Shepherd 16 Arkansas 17 Nap 19 Impasto 21 Arran 22 Corgi 23 Enclave DOWN: 1 Affable 2 Computer 3 Mere 4 Stitches 5 Rail 6 Happy 8 Silverstone 13 Starship 14 Ring road 15 Spinner 18 Piece 20 Park 21 Arcs QUICKIE ACROSS: 1 Glove puppet 8 Bee 9 Ark 11 Inferno 12 Siren 13 Net 14 Leo 15 Juggled 17 Egg 19 Open 21 Afar 23 Page 25 Lobe 27 Wee 29 Deposit 31 Ail 34 Era 36 Price 37 Bottles 38 Tin 39 See 40 Softhearted DOWN: 1 Gene 2 Left 3 Verruca 4 Plough 5 Paste 6 Earl 7 Tree 8 Binge 10 Known 16 Dog 18 Gab 20 Pew 22 Fed 24 Aviator 25 Leapt 26 Gobble 28 Erase 30 Erect 32 Iris 33 Lino 34 Else 35 Reed
Which town was the Duchess of Cambridge visiting on Tuesday when she reportedly let slip to a member of the public that she and the Duke of Cambridge are expecting a girl?
Summary: Michael Caine has let slip that he thinks The Dark Knight Rises will not be quite as good as Cars 2.
Corden's guest appearance was meant to be a secret but the comic apparently let slip to a fan on a train to the capital as he learnt his lines.
Swede Parnevik, who let slip a golden chance to win the 1994 Open at the same course, slipped up again after getting himself in a good position with a round of 64 in the morning session, but then falling off the pace to miss out on one of the eight qualifying spots.
The singer's other half Richard Jones let slip her beauty tricks when he spoke to me at Thursday's Ivor Novellos.