(as) easy as A, B, C

See: as easy as pie

• dollar signs in someone's eyes
• dollars to donuts
• dollars to doughnuts
• Do me a favour!
• do me a favour
• domino effect
• do more harm than good
• done deal
• done dressed up like a dog's dinner
• done for
• done in
• done thing
• done up up like a dog's dinner
• Don Juan
• donkey's years
• donkey work
• don't ask
• don't ask me
• Don't ask me.
• Don't bet on it.
• don't bet on it
• Don't count chickens.
• Don't count chickens before they're hatched.
• Don't count your chickens.
• Don't count your chickens before they're hatched.