take one's hat off to
Also, take off one's hat to. Express one's admiration, as in I take off my hat to you—you've done very well indeed. [Mid-1800s] Also see hats off to.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.