mum's the word

mum's the word

A request or pledge to keep something a secret. Now, I don't want anyone to know that I'm pregnant yet, so mum's the word. Your secret is safe with me. Mum's the word.
See also: word
Farlex Dictionary of Idioms.

Mum's the word.

Fig. a pledge not to reveal a secret or to tell about something or someone. "Mum's the word," said Jane to ease Mary's mind about her secret.
See also: word
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

mum's the word

Say nothing about this, it's a secret, as in Mum's the word on tonight's surprise party. This expression dates from about 1700, but mum, meaning "silence," is much older. In 2 Henry VI (1:2) Shakespeare wrote, "Seal up your lips, and give no words but mum."
See also: word
The American Heritage® Dictionary of Idioms by Christine Ammer.

mum's the word

say nothing; don't reveal a secret. informal
In both of these idioms, mum stands for an inarticulate sound made with pursed lips indicating either unwillingness or inability to speak.
1991 Atlantic City Mum's the word on who will play the major figures in this tale of woe.
See also: word
Farlex Partner Idioms Dictionary

ˌmum’s the ˈword!

(informal) used for telling somebody to keep a secret or for telling somebody that you will keep a secret: ‘Nobody must mention this project outside the office. I hope that’s clear.’ ‘We understand, John. Mum’s the word!’
These two idioms refer to the sound you make when your mouth is closed.
Farlex Partner Idioms Dictionary

mum's the word

Say nothing of the secret you know: Mum's the word on the surprise party.
See also: word
American Heritage® Dictionary of the English Language, Fifth Edition.

mum's the word

Keep it a secret. This seemingly modern slang phrase was used by Shakespeare—“Seal up your lips, and give no words but—mum” (HenryVI, Part 2, 1.2)—as well as numerous earlier writers. The word mum has meant silent since about 1350 and comes from the imitative sound made when one’s lips are closed (a kind of hum). The actual locution “Mum’s the word” appears in print over and over from about 1700.
See also: word
The Dictionary of Clichés by Christine Ammer
See also:
  • mum's the word!
  • not breathe a word
  • not breathe a word (of something)
  • won't breathe a word
  • make a secret of
  • make a secret of (something)
  • the cat is out of the bag
  • in secret
  • mifky-pifky
  • pifky
References in periodicals archive
Mum's The Word, King's Theatre, Edinburgh, 0131 529 6000, 6pm & 8.30pm, pounds 11-pounds 18.
Mum's the word A night's B&B starts at pounds 125.
Bernie Nolan who stars in Mum's the Word at the Belgrade Theatre.
Sister Maureen is also in Mum's the Word and they have both been sharing digs up and down the country.
Mum's The Word is a production that hangs the dirty nappy laundry of maternity out to dry and brings both the laughter and tears of motherhood to the stage.
Mum's the Word is performed by women and for women .
Mum's the Word was written by six Canadian actresses who claim motherhood reduced them to a state of exhaustion.
Mum's the word CC is aiming to reach a younger audience with its new high summer campaign.
Mum's the word The Pear Tree at Purton has a traditional three-course roast lunch on Mothering Sunday for pounds 19.50 per person.
Entitled Mum's the Word, it follows the true-life story of one woman, her midwives, health visitor and family as they support her through her baby's birth and beyond into motherhood.
It is one reason why she accepted a role in Mum's the Word, the hit show about motherhood which opened at the Liverpool Empire last night.
MUM'S the word for dads-to-be Shakeel Goulthorp and Liam Moynihan as they prepare for their first experiences of fatherhood to be shown on national television.
SINGER-turned-actress Lorraine McIntosh is looking forward to making her stage debut in Mum's the Word.
MUM'S THE WORD J A radiant Carole Middleton shows off baby Kate shortly after the youngster's birth in January 1982
MUM'S THE WORD: Fourteen midwives at Liverpool Women's Hospital are pregnant at the same time