do in

phrasal verb [transitive]
Word forms "do in":
present tense I/you/we/they do in he/she/it does in present participle doing in past tense did in past participle done in

1) informal to murder someone

I reckon someone did her in to get her money.

2) [usually passive] spoken to make someone feel very tired

I'm completely done in after all that running around.

It was climbing that last hill that really did them in.