have windmills in (one's) head(redirected from have windmills in their heads)
have windmills in (one's) head
To be lost in dreams and illusions, rather than rooted in reality. I appreciate Sal's ability to see beyond what is happening right now, but some of the wild ideas he comes up with make me wonder if he has windmills in his head!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.