have rocks in one's head
see rocks in one's head.
Why Dr. Martin Luther King Jr.’s “I Have A Dream” Was Pure PoetryKing uses anaphora to highlight the difference between how things are and how he hopes they will be. But, what's anaphora?
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.