Dance to someone’s tune
If you dance to someone’s tune, you do whatever that person tells you to do
Example : He is the company’s major shareholder so the management has to dance to his tune
Dead wood
The term dead wood refers to people or things which are no longer considered useful or necessary
Example : The new manager wants to reduce costs by cutting out the dead wood
Devil’s advocate
During a discussion or debate, if you play devil’s advocate, you pretend to be against an idea or plan in order to determine the validity of the arguments in favor of it
Example : She decided to play devil’s advocate just to see how strongly people felt about the project
Dig in your heels
If you dig in your heels, you refuse to do something, especially if someone is trying to convince you to do so
Example : My grandfather dug in his heels and refused to move to an apartment