Meaning of “be like a red rag to a bull” in the English Dictionary

british dictionary

"be like a red rag to a bull" in British English

See all translations

be like a red rag to a bull

mainly UK

to be certain to produce an angry or violent reaction:

Don't tell him you're a vegetarian - it's like a red rag to a bull.

(Definition of “be like a red rag to a bull” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)