Idioms and Phrases with start something
Cause trouble, especially a quarrel or fight, as in Stop bringing that up—do you want to start something? [Colloquial; early 1900s]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.