Смысл:
a capella 
a cap(p)ella[͵aıkəʹpelə]
муз.
<Í> 1. а капелла, без инструментального сопровождения (о хоровом пении)
2. в стиле духовной музыки; храмовой (о напеве и т. п.)
CA Идиома
a basket case
a person who is very nervous, in bad shape If Gloria has one more crisis, she'll be a basket case.
a card
(See such a card)
a case of
an example of, it's a case of Look at Bosnia. That's a case of ethnic civil war.
a caution
a bold or shocking person, no shrinking violet She is a caution! She told the judge he was all wrong.
a close call
close to danger or an accident That was a close call. The train nearly hit the bus!
a feather in your cap
an honor, a credit to you, chalk one up for you Because you are Karen's teacher, her award is a feather in your cap.
a fraidy cat
a child who is afraid to jump etc., chicken """Ian's a fraidy cat!"" the boys shouted. ""Ian's afraid to jump!"""
a full house (cards)
a pair plus three of a kind, e.g., 2 kings and 3 aces In our last game of poker, you dealt me a full house.
a loose cannon
unpredictable employee, one who may embarrass The President is sensible, but the Vice President is a loose cannon.
a lost cause
a goal or project that is not worth working for That video store is a lost cause. It has never made a profit.
a nut case
a person who is crazy, crackpot If you go to work in pajamas, people will say you're a nut case.
a piece of cake
easy to do, it's a snap, no problem Solving the puzzle was easy. It was a piece o' cake.
a tough call
a difficult decision, a hard choice Was the goal scored before the game ended? It's a tough call.
above and beyond the call of duty
much more than expected, go the extra mile Her extra work was above and beyond the call of duty.
alley cat
stray cat He began to feed the alley cat and now it comes to his house every day.
American as apple pie
(See as American as apple pie)
as American as apple pie
very American, like an American custom Jeans and T-shirts are American, as American as apple pie!
as scarce as hen's teeth
rare, uncommon, not many of them Country doctors are as scarce as hen's teeth.
at your beck and call
serving you, doing everything for you You don't have to be at his beck and call, doing whatever he asks.
basket case
(See a basket case)
basta la musica
stop the music, do not play the music """Basta la musica!"" Papa shouted. ""It's too loud!"""
be a piece of cake
be very easy.
beck and call
(See at your beck and call)
beggars can't be choosers
people who receive free things should not expect the best "When they complained about the shabby coats, he said, ""Beggars can't be choosers."""
beyond the call of duty
(See above and beyond the call of duty)
bite off more than one can chew
take responsibility for more than one can
bite off more than you can chew
begin more tasks than you can complete When I took the night class, I bit off more than I could chew.
burn the candle at both ends
work or play too hard without enough rest He has been burning the candle at both ends with his work and his studies. That is why he became sick.
CA
Chartered Accountant We went to see a CA in order to get our income tax finished on time.
Cabbagetown
a district in Toronto where European immigrants live Restaurants in Cabbagetown serve European food.
cabin fever
feeling depressed because you have to stay inside After three weeks of cold weather we all had cabin fever.
cackleberries
eggs, chicken eggs Look! This hen laid five cackleberries!
calculated risk
an action that may fail but has a good chance to succeed They took a calculated risk when they introduced the new computer screen onto the market.
call a spade a spade
"say it in plain language; the straight goods" Kris will report the facts. She's not afraid to call a spade a spade.
call attention to
ask you to read or notice, draw attention to I would like to call attention to the student parking problem.
call for
require, ask for This recipe calls for bee pollen. Where can we get that?
call his bluff
challenge his story, give it to me straight, put up or shut up When I called his bluff about low profits, he admitted that the company made 11 million.
call it a day
stop work for the day.
call it quits
stop doing something, quit what you are doing The dust is bothering all of us. I think we should call it quits.
call it square
we do not owe each other, it is a wash, we are even "I bought the pizza; you bought the beer. Let's call it square."
call off
stop, quit, cancel The meeting was called off because everybody was busy dealing with urgent business.
call off the dogs
tell your friends to stop harassing me Okay, I'll pay what I owe you. But call off the dogs!
call on
ask, request I may call on you to speak at the meeting. Will you speak to us?
call tabs
collect money from bar customers If customers are drunk, you call their tabs and ask them to leave.
call the shots
make the decisions, decide what happens Mr. Binks may be the president, but Ms. Barker calls the shots.
call up
phone, dingle you, give me a ring, Call her up and ask her for a date. Go ahead, phone her.
calm before the storm
(See the calm before the storm)
calm down
not be so upset, chill out Please calm down, Mr. Tse. Your daughter is safe.
camel toes
the folds of the vagina revealed by tight jeans When Betty wears her old jeans you can see her camel toes.
can
(See the can)