In the wars is a mainly British expression meaning battered, injured, exhausted, or in poor condition. It can describe a person or a thing.
The phrase appears to have grown from military slang. The idea is straightforward: someone who has been through wars is likely to be marked, hurt, or worn down by the experience. Over time, English speakers extended that image to everyday life, even when no actual fighting was involved.
Today, people use it for minor injuries, illness, tiredness, or anything that looks a bit beaten up.
- After the marathon, I was really in the wars.
- He came back from the dentist looking in the wars.
- The car is a bit in the wars, but it still runs well.
This is usually an informal phrase. It often suggests that someone has had a rough time recently, rather than a serious medical emergency. For objects, it means worn, damaged, or shabby. That wide use is why the expression still feels vivid and useful in modern English.