do in

verb

1. To kill or end; to defeat.

   “By the eighth mile, I was sure that finishing the 10-mile hike would do me in.”

   “We very nearly did in an entire keg of beer that weekend.”

2. To exhaust, to tire out.

   “I’m off to bed. I’m completely done in.”

   “I'm exhausted! That 20-mile hike has done me in.”

3. To damage or injure.

   “I’m off work at the moment; I’ve done my back in.”

4. To rob (someone); to steal or pilfer from (someone).
5. To eat.

   “I can do in a dozen eggs.”