on a rampage
Behaving violently, as in There was a near riot after the game, when some of the spectators went on a rampage. This term comes from the Old Scots verb ramp, meaning “to storm and rage.” [Mid-1800s]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.