Deadbeat
A person who never pays his debts. There is a new government policy to penalize deadbeat fathers.
Deadpan
An expressionless or emotionless face. My friend had a deadpan expression when he told us the story.
Deaf and dumb
To be unable to hear or speak. The man was deaf and dumb and could not communicate with the woman on the train.
Deal in (something)
To buy and sell something. The man has been dealing in antiques for many years.
Deal with (someone)
To act in a specific way toward someone, to do business with someone. The company is planning to deal with the late employee soon.
Deal with (something)
To be concerned with something, to take action about something . We will deal with the boxes tomorrow.
Decide in favor of (someone orsomething)
To determine the winner of something, to decide who is right. The city decided in favor of building a new bridge over the river.
Decked out
To be dressed in fancy clothes. My sister was decked out in her best clothes for the party.
Deem it to be necessary
To believe that something is necessary. The judge deemed it to be necessary to postpone the trial for a week.
Deep-six (something)
To throw away something, to dispose of something. I decided to deep-six my videos as I did not want them any longer.