on the QT

on the QT

Confidential(ly); secret(ly); without anyone else knowing. "QT" is an abbreviation of "quiet." Please keep this information on the QT until we are ready to make a public announcement. It turns out he's been writing a romance novel on the QT.
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Farlex Dictionary of Idioms.

on the QT

quietly; secretly. (An abbreviation of quiet.) The company president was making payments to his wife on the QT. The mayor accepted a bribe on the QT.
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McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

on the Q.T.

Secretly, as in They told her on the Q.T. that she was being promoted. This slangy term, in which Q.T. is an abbreviation for "quiet," was first recorded in 1884.
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The American Heritage® Dictionary of Idioms by Christine Ammer.

on the QT

OLD-FASHIONED
If you do something on the QT, you do it secretly. Note: `QT' is sometimes written as `q.t.'. It is pronounced `q t', as if you were spelling it out. They've asked our government to help them. All on the QT, of course. Many of the companies had been selling weapons to the terrorists for years, openly or on the q.t. Note: In this expression, `QT' is short for `quiet'.
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Collins COBUILD Idioms Dictionary, 3rd ed.

on the q.t.

secretly or secret; without anyone noticing. informal
q.t. is a humorous abbreviation of quiet .
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Farlex Partner Idioms Dictionary

on the QT

mod. in secret; secretly. (From QuieT.) He said it on the QT so no one else knows except you and me.
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McGraw-Hill's Dictionary of American Slang and Colloquial Expressions

on the QT

Clandestinely, secretly. This slangy expression, dating from the late 1800s, uses QT as an abbreviation for “quiet.” George Moore had it in A Mummer’s Wife (1887), “It will be possible to have one spree on the strict Q.T.”
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The Dictionary of Clichés by Christine Ammer

on the Q.T.

Confidentially. “Q.T.” is simply a shortened form of the word “quiet.” You're being told something on the Q.T. is to be asked to keep it under your hat.
See also: on
Endangered Phrases by Steven D. Price
See also:
  • bo
  • FYI
  • Y3
  • FWIW
  • shwoman
  • TMI
  • OTT
  • AIIC
  • WYM
  • phonetic
References in periodicals archive
KDE 4.0 and previous versions were all based on the Qt library, a cross-platform framework that allows creating applications for Windows, Linux and Mac OSX.
KDE Frameworks 5.0: What it means for KDE
Drugs that have a mild effect on the QT interval at low plasma levels usually have a magnified effect at higher concentrations.
Cardiovascular risks of anticholinergic therapy: considerations for office-based management
The agency's dosage recommendation is based on post-marketing reports of QT prolongation associated with citalopram and results of a randomized, double-blind, placebo-controlled crossover study evaluating the effects of 20-mg and 60-mg doses of citalopram on the QT interval in adults.
FDA: high-dose citalopram tied to heart risks
The agency's dosage recommendation is based on postmarketing reports of QT prolongation associated with citalopram and results of a randomized, doubleblind, placebo-controlled crossover study evaluating the effects of 20-mg and 60-mg doses of citalopram on the QT interval in adults.
High-dose citalopram tied to abnormal heart rhythms
23 -- The recent concern about the future of Symbian and Qt in a post Nokia-Microsoft world seems to have had little effect on the open source community hacking away on the Qt framework, as a Qt developer has just released a suite of tools to help create / port Qt applications to Android.
Qt comes to the Android platform
The agency's dosage recommendation is based on postmarketing reports of QT prolongation associated with citalopram and results of a randomized, double-blind, placebo controlled crossover study evaluating the effects of 20-mg and 60-mg doses of citalopram on the QT interval in adults.
Safety warnings issued on citalopram