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easy as ABC
Extremely easy. Come on, give me a hard one! These equations are easy as ABC!
be (as) easy as ABC
To be extremely easy, simple, or intuitive; to require very little skill or effort. After so many years as an accountant, doing taxes is as easy as ABC for me. Don't worry, after some lessons and a bit of practice, driving is as easy as A-B-C!
the ABCs of (something)
The essential facts or details about something. Can you just give me the ABCs of this chapter on mitosis so I don't fail the test?
the ABCs of something
Fig. the basic facts or principles of something. I have never mastered the ABCs of car maintenance.
know one's ABCs
Fig. to know the alphabet; to know the most basic things (about something). Bill can't do it. He doesn't even know his ABCs. You can't expect to write a letter when you don't even know your ABCs.
easy as pie
Also, easy as falling or rolling off a log . Capable of being accomplished with no difficulty, as in This crossword puzzle is easy as pie. The first term presumably alludes to consuming pie (since making pie requires both effort and expertise). The variants most likely allude to standing on a log that is moving downstream, a feat in which falling off is a lot easier than remaining upright. Mark Twain had it in A Connecticut Yankee in King Arthur's Court (1889): "I could do it as easy as rolling off a log." The first colloquial term dates from the early 1900s, the colloquial variants from the 1830s. For a synonym, see piece of cake.
easy as pieor
easy as ABC
If something is easy as pie or easy as ABC, it is very easy to do. Note: In the first idiom below, ABC is pronounced `a b c', as if you are spelling it out. With technology the way it is, it's as easy as pie to work from remote locations. With our guide, planning your US fly-drive holiday will be as easy as ABC. Compare with a piece of cake. Note: The reference is probably to eating a pie rather than making one.
as easy (or simple) as ABCextremely easy or straightforward.
From the 15th to the 17th century, a child's first spelling and reading book was commonly called an ABC , and this led to the development of its metaphorical use, ‘the basic elements or rudiments of something’.
easy as pievery easy. informal
Pie as a metaphor for something pleasant was originally late 19th-century US slang. Compare with nice as pie and pie in the sky (at pie).
(as) ˌeasy as ABˈC/ˈpie/falling off a ˈlog(informal) very easy: Try using the new photocopier. It’s as easy as pie.
easy as pieInformal
Capable of being accomplished or done with no difficulty.