Dark horse Darken someone's door Darkest hour is just before the dawn Day in, day out Day of reckoning Days are numbered Dead and gone Dead as a dodo Dead as a door nail Dead duck Dead horse Dead in the water Dead of night Dead to the world Deaf as a fencepost Deal me in Delicate condition Deliver an ultimatum Desert a sinking ship Die is cast, The Dig one's own grave Dim and distant past, The Dirty old man Discover for yourself Do it right! Do it! Do one's own thing Do someone proud Do the honors... Do you come here often? Does your mother know you're out? Doesn't have a leg to stand on Dog in the manger Dog's life, A Don't call us, we'll call you Don't count your chickens before they hatch Don't do anything I wouldn't do! Don't know whether to laugh or cry Don't shoot the messenger! Don't sweat it Don't tell anyone, but.... Don't worry, be happy Done to a turn Dot the i's and cross the t's Doubting Thomas Down and out Draw a blank Dressed to kill Dressed to the nines Dribs and drabs Drink like a fish Drive a hard bargain Drop dead Drop in the bucket Drop of a hat, At the Dry as a bone Dyed in wool