Answer: GRRR
GRRR is a crossword puzzle answer that we have spotted 13 times.
Referring Clues:
- Boxer's warning
 - Angry warning
 - Watchdog's warning
 - Angry dog's warning
 - Mad dog's warning
 - Warning from a boxer, perhaps
 - "That makes me mad!"
 - Dog's sound
 - [Don't touch my food!]
 - Warning sound from Fido
 - Angry puppy's sound
 - Exclamation of frustration
 - Angry dog's sound
 
Last Seen In:
- New York Times - February 27, 2022
 - Netword - May 17, 2020
 - Netword - November 21, 2016
 - Washington Post - January 07, 2015
 - Chicago Reader - April 25, 2014
 - Washington Post - March 22, 2013
 - New York Times - June 02, 2012
 - King Syndicate - Premier Sunday - November 13, 2011
 - Washington Post - December 01, 2010
 - Washington Post - July 29, 2010
 - Netword - November 24, 2009
 - Universal - September 18, 2009
 - USA Today - November 01, 2006
 - New York Sun - January 18, 2006
 - New York Times - May 09, 2002
 
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