This English idioms lists includes expressions which have a main word that begins with the letters "X, Y or Z." If you want to learn idioms that start with other letters of the alphabet: click here to go to the main idioms page.
An idiom is a group of words whose meaning is different from the individual words if you looked them up separately in the dictionary. Here are the most common idioms beginning with these letters - and you'll immediately notice that there are very few idioms that have a main word beginning with "X." This is not surprising since there aren't many words that start with the letter "X."
x marks the spot: an “x” is used to show the exact location (spot) of something.
year after year: every year for many years.
year in, year out: every year for many years.
(all) year round: during the whole year, happening all year.
in years: in a long time.
getting on in years: becoming old.
yell bloody murder: to scream really loudly.
yes man: someone who always agrees with authority (always says “yes”).
YOU, YOU’RE, YOURSELF
you can say that again: you strongly agree with something someone said.
you can’t take it with you: enjoy life today because you can’t take your money or possessions with you when you die.
you can’t teach an old dog new tricks: An idea that older people can't learn new skills or learn how to do new things.
you get what to pay for: the price of something usually equals its quality (especially cheap things are of low quality).
you’re toast: you’re in trouble.
by yourself: all alone.
keep something to yourself: Keeping or having something only for you.
yours truly: me, myself.
zero in on something: to focus or pay attention to one particular thing.
zip one's lips: to be silent; to not tell a secret (as if the lips were zipped with a zipper so the person cannot talk).
zone out: to not pay attention to things happening around you.
zoom in on something: to examine or look at something more closely.
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You can also find many idiom definitions with the different online learner's dictionaries.