Idioms and Phrases with see stars
Perceive flashing lights, especially after a blow to one's head. For example, A swinging door hit me and I really saw stars. [Late 1800s]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.