An example of a rampage is someone shooting random people all over a shopping mall.
intransitive verb-·paged·, -·pag·ing
Origin of rampageorigin, originally Scottish and North Eng dialect, dialectal , probably from ramp
intransitive verbram·paged, ram·pag·ing, ram·pag·es
Origin of rampageScotspossibly from ramp 2
(third-person singular simple present rampages, present participle rampaging, simple past and past participle rampaged)
From Middle English ramp (“rave, rush wildly about"), from Old French ramper.