- (transitive, colloquial) To kill or end.
- 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.
2017 October 27, Alex McLevy, “Making a killing: The brief life and bloody death of the post-Scream slasher revival”, in The Onion AV Club:
- Slasher fans rejoiced—for a couple years anyway, until the boom swiftly faded, done in by the same causes that fell so many other eruptions of a style or genre, of any medium: The host of imitators are never as good as what inspired the affection in the first place.
- (transitive, colloquial) To exhaust, to tire out.
- I'm off to bed. I'm completely done in.
- (transitive, colloquial) To damage or injure.
- I'm off work at the moment; I've done my back in.
to kill or end