catch phrase

a phrase that attracts or is meant to attract attention.

a phrase, as a slogan, that comes to be widely and repeatedly used, often with little of the original meaning remaining.

Origin of catch phrase

First recorded in 1840–50; catch(word) + phrase

For those wondering, this vanishing middle ground is where the book gets its catch-phrase title.

Welcome to Tyler Cowen’s Future of Genius Machines |Robert Herritt |September 17, 2013 |DAILY BEAST
“Mean Girls” is the catch-phrase du jour, with a new breed of “expert” looking to cash in.

What Makes Mean Girls Tick |Jessica Bennett |August 12, 2011 |DAILY BEAST
Simpson had mentioned the situation so many times that it had become a catch-phrase with us.

Punch, or the London Charivari, Vol. 146, April 1, 1914 |Various
The reader is never allowed to forget the catch-phrase of Micawber or the moral look of Pecksniff.

Materials and Methods of Fiction |Clayton Hamilton

There was never a catch-phrase, “Have you seen the French President?”

If I May |A. A. Milne
When the Swiss invented a catch-phrase they did not drop it in a hurry.

William Tell Told Again |P. G. Wodehouse

catch phrase

a well-known frequently used phrase, esp one associated with a particular group, etc