Wiktionary
adv. (context idiomatic English) behaving violently or to riot
Usage examples of "on the rampage".
When, in 1862, Sioux Indians went on the rampage in Minnesota - because they felt they had been cheated out of their land - accounts of the rising emphasised the suffering of children.
The hooligans would be on the rampage hours before kick-off time and with the police being foolish enough to allow these demonstrations to go ahead there could be all kinds of trouble.
So when someone hears that a particular warlord is on the rampage, there is a lack of gravity about that.
You know as well as I do that if the kill crews go on the rampage again it'll stir up more unrest than we ever could.
Even then, the chances of getting the man out of the country and five hundred kilometres north to France, with the Italians on the rampage would be very slight indeed.
A lot of the radio stations from California were broadcasting really terrible things about martial law, army blockades, home-boys with automatic weapons on the rampage, and rumors of people dying by the tens of thousands.
For it was John Scofield who had kicked open the bottom of his drawer, slithered out and gone on the rampage in the morgue, and it had been Tod Prentiss he was looking for - still looking for, even in death!