tag line

or tag·line

noun

the last line of a play, story, speech, etc., used to clarify or dramatize a point.
a phrase or catchword that becomes identified or associated with a person, group, product, etc., through repetition: Entertainers often develop tag lines, like Ted Lewis's “Is everybody happy?”
Machinery. (on a crane) a cable for steadying a suspended bucket at the rear.

Origin of tag line

First recorded in 1935–40

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for tagline

Contemporary Examples of tagline

That should really be the tagline for the action-heavy fourth season of Homeland: “No Country For Young Daughters.”
‘Homeland’ Season 4: A Stripped-Down and Surprisingly Badass Return to Form
Marlow Stern
September 30, 2014
The tagline for the Museum is “Paz, Memoria, y Sobernía”: Peace, Memory and Sovereignty.
The Never-Ending Falklands War: In Buenos Aires, A Museum's Selective History
Michael Luongo
August 30, 2014
The tagline for the fourth season of Game of Thrones was “All Men Must Die.”
Valar Morghulis: Game of Thrones’ Women Are Going to Rule the World
Scott Bixby
June 17, 2014
The ad campaign surrounding the launch bears the tagline “Failure is an Option.”
Domino’s Fried-Chicken Pizza Means We’ve Hit Peak Food Trolling
Daniel Gross
April 16, 2014
The tagline on his website, which he launched in July, reads: “If you don't want your drone to go down, don't fly it in town!!!!!”
Drone Hunting Vote Is Squashed by Citizen Protest
Abby Haglage
December 10, 2013

British Dictionary definitions for tagline

tag line

noun

an amusing or memorable phrase designed to catch attention in an advertisement
another name for punch line

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for tagline

"punchline of a joke," 1926, originally "last line in an actor's speech" (1916), from tag (n.1) + line (n.).