- something that arouses anger; a provocation; red flag: A mere mention of the incident is a red rag to him.
Origin of red rag
First recorded in 1690–1700
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- a provocation; something that infuriates
so called because red objects supposedly infuriate bulls
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