A: What’s your plan for the coming holiday?

B: I will go back to my hometown to spend some time with my elder sister. I really take my hat off to her. She raised five children all by herself after her husband died. I don’t know how she managed, but all the children graduated from college and have good jobs.

Note: Since many people would wear hats in the past and they would literally take their hats off to someone to greet, salute or congratulate that person, this idiom means “to praise, salute, congratulate, or pay tribute to someone or something.” For example: I take my hat off to that organization for providing help when no one else does.