do in

British  

verb

1. to murder or kill

2. to exhaust

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do in Idioms  

1. Tire out, exhaust, as in Running errands all day did me in . [ Colloquial ; early 1900s] Also see done in .

2. Kill, as in Mystery writers are always thinking of new ways to do their characters in . [ Slang ; early 1900s] Also see def. 4.

3. Ruin utterly; also cheat or swindle. For example, The five-alarm fire did in the whole block , or His so-called friend really did him in . [First half of 1900s]

4. do oneself in . Commit suicide, as in She was always threatening to do herself in . [ Slang ; first half of 1900s]

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Example Sentences

Minneapolis Mayor Jacob Frey told reporters he had reviewed footage of the incident, which led him to believe “the narrative that this was done in self-defense is a garbage narrative.”

From Los Angeles Times

“So, I’m deliberately not telling them what to do in the first week back after the holiday break.”

From The Wall Street Journal

“We believe the group is trading close to fair value here, and would look to be more aggressive when the market gives us the opportunity, like we did in 2025,” he added.

From Barron's

We didn’t have our own lingo and mall culture, like they did in the Valley.

From Los Angeles Times

“We believe the group is trading close to fair value here, and would look to be more aggressive when the market gives us the opportunity, like we did in 2025,” he added.

From Barron's