[on the warpath] {adj. phr.}, {informal}
1. Very angry.
* /When Mother saw the mess in the kitchen she went on the warpath./* /Betty has been on the warpath ever since she found out she was not invited to the party./
2. Making an attack; fighting.
* /The government is on the warpath against narcotics./* /The police are on the warpath against speeders./