take off hat
take off (one's) hat (to someone or something)
To praise, salute, congratulate, or pay tribute to someone. I must take off my hat to you for your stunning victory, Mr. President. We all take off our hats for your recent promotion, Janet. I really have to take off my hat to the company for coming up with such an ingenious product.
take off one's hat (to someone)
Fig. to offer praise for someone's good accomplishments. I have to take off my hat to Mayor Johnson. She has done an excellent job. Yes, we all ought to take off our hats. She is our best mayor ever.