“Grass sb up” is a British informal phrasal verb meaning to inform on someone, usually to the police or an authority, often betraying their trust.<\/p> \n\n
The phrase “grass sb up” is commonly used in British English to describe the act of telling someone in authority about another person\u2019s wrongdoing. It usually implies a sense of betrayal or informing on someone, especially in situations involving rules or laws. Understanding the “grass sb up meaning” helps learners recognize when someone is being reported or “snitched” on. This phrase is often heard in conversations about crime, school, or work environments where trust is important. Knowing how to use “grass sb up” correctly will help you sound more natural in informal conversations and understand British slang better.<\/p> \n\n\n\n\n