such and such

definite or particular, but not named or specified: They turned out to be such and such kind of people.

something or someone not specified: if such and such should happen.

Words nearby such and such

late Middle English word dating back to 1400–50

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

The man was a member of the Los Angeles police force investigating a disturbance at such-and-such and address.
The Stacks: Mr. Bad Taste and Trouble Himself: Robert Mitchum|Robert Ward|July 19, 2014|DAILY BEAST
Every time we leave a screening there are more Blackberry alerts that such-and-such has sold to so-and-so.
The Details on 'The Details'|Nicole LaPorte|January 25, 2011|DAILY BEAST
This does not mean ordering a bayonet charge, or the firing of a volley at such-and-such o'clock.
The Armed Forces Officer|U. S. Department of Defense
At the question, 'When you were working with Dmitri, didn't you see anyone on the staircase at such-and-such a time?'
Crime and Punishment|Fyodor Dostoevsky

You may believe that such-and-such a horse will win the Derby.
The Analysis of Mind|Bertrand Russell
Why must they fold their bed-clothes in such-and-such an exact way?
Nights in London|Thomas Burke
The department had a report that such-and-such a car was stolen.
The Auto Boys' Vacation|James A. Braden

such and such

Not specified, unnamed and undetermined, as in They agreed to meet at such and such a time and place. [Mid-1500s]