- Daft as a brush
- Damp squib
- Dance attendance on
- Daniel come to judgement
- Darby and Joan
- Dark horse
- Darkest hour
- Darkest hour is just before the dawn
- Dark side
- Darling buds of May
- Dash to pieces
- Date rape
- Davy Jones' locker
- Daylight robbery
- Days are numbered
- Dead as a dodo
- Dead as a doornail
- Dead cat bounce
- Dead in the water
- Dead ringer
- Delusions of grandeur
- Derring-do
- Designer stubble
- Deus ex machina
- Devil and the deep blue sea
- Devil has all the best tunes
- Devil Incarnate
- Devil makes work for idle hands to do
- 'Devil' phrases
- Devil take the hindmost
- Devil to pay
- Devil's advocate
- Diamond in the rough
- Diamond is forever
- Dicky-bird
- Die-hard
- Die has been cast
- different as chalk and cheese
- Different kettle of fish
- Different strokes for different folks
- Differently abled
- Dilly-dally
- Dirt bag
- Dish fit for the gods
- Do unto others as you would have them do to you
- Dock your pay
- Doesn't know s*** from Shinola
- Doff your hat
- Dog days
- Dog in the manger
- Dog is a man's best friend
- 'Dog' phrases
- Dog's b*******
- Dog's breakfast
- Dog's dinner
- Doldrums
- Dollars to doughnuts
- Done a runner
- Done to a turn
- Donkey work
- Donkey's years
- Don't call us, we'll call you
- Don't change horses in midstream
- Don't count your chickens before they are hatched
- Don't die like I did
- Don't get mad, get even
- Don't get your knickers in a twist
- Don't go there
- Don't have a clue
- Don't keep a dog and bark yourself
- Don't let the bastards grind you down
- Don't let the cat out of the bag
- Don't let the grass grow under your feet
- Don't look a gift horse in the mouth
- Don't shut the stable door after the horse has bolted
- Don't throw good money after bad
- Don't throw the baby out with the bathwater
- Don't try to teach your Grandma to suck eggs
- Don't wash your dirty linen in public
- Doom and gloom
- Double cross
- Double, double toil and trouble, fire burn, and cauldron bubble
- Double Dutch
- Double entendre
- Double standard
- Double whammy
- Down at heel
- Down in the dumps
- Down to the wire
- Down the pan
- Down the tubes
- Drag race
- Dragged through a hedge backwards
- Draw a blank
- Draw your horns in
- Dreams of empire
- Dressed to the nines
- Drink like a fish
- Driving while black
- Drop-dead gorgeous
- Drop in the bucket
- Dropping like flies
- Drummed out of the army
- Ducks and drakes
- Dumb blonde
- Dust up
- Dutch
- Dutch courage
- Duvet day