Useful English Word or Phrase to Boost Your English: A Grass / To Grass

What does it mean?

A grass is an informal UK word for someone who tells an authority figure what someone else has done wrong (a snitch or informer). To grass means to do that - to tell on someone.

Is it positive or negative?

It's highly negative - calling someone a "grass" implies betrayal or disloyalty.

When do you use it?

Use it when talking about someone reporting others to the police, teachers, or employers for bad behaviour.

Examples

Example 1 (Noun): "Don't tell him our plan; he's a total grass and will tell the teacher."

Example 2 (Verb): "I can't believe she grassed on me just for being five minutes late to class."

Question for you

Do people in your culture use a similar word for someone who betrays others?

Are you looking for English speaking practice online?

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