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Idioms

Catch someone red-handed: idiom meaning, examples and practice

Catch someone red-handed means to catch them in the act of doing something wrong. See examples, a mistake with an extra on, and a short exercise.

Catch someone red-handed means to catch a person at the very moment they are stealing or doing something else wrong. The expression is used both seriously, in news about crimes, and jokingly, about small things at home. It sounds natural in conversation; in an essay, a neutral option is be caught committing a crime.

When would you say catch someone red-handed?

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catch + someone + red-handed (+ -ing); be caught red-handed (+ -ing)

  • A shop assistant caught the man red-handed with three bottles of perfume in his bag.
  • My mum caught me red-handed eating the cake she had baked for the guests.
  • Two students were caught red-handed using their phones during the final exam.

What changed

First versionThe cashier caught him red-handed on stealing chocolate bars.

RevisionThe cashier caught him red-handed stealing chocolate bars.

The activity someone was caught doing comes straight after red-handed, in the -ing form, with no preposition. So there is only one correction: on was removed.

Cambridge Dictionary

Red-handed only works if the person was caught at the very moment of doing something wrong. If the truth came out later, from cameras or receipts, use find out: The manager later found out that he had taken the money. The closest phrase in meaning to red-handed is catch someone in the act.

Your turn

The teacher turned round at the exact moment Max was copying his neighbour's answers, so she caught him ___.

(red-handed / red-faced)

Show the answer

red-handed — The teacher saw the copying at the exact moment it was happening, so she caught him red-handed. Red-faced means blushing with embarrassment: it could describe Max afterwards, but it does not work with caught in the sense of catching someone doing something.

Describe a time when someone was caught doing something they shouldn't: at home, at school or at work. Write who caught whom and what they were doing.

My dad caught my little brother red-handed playing video games at two in the morning.

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