Idiomatic Expresion 2:

1-Stand backphrasal verb
to move a short distance away from something or someone:
- Please stand back - then all of you will be able to see what I'm doing.
We STOOD BACK while he lit the firework.

2- Years back
(Of time) In times past; ago.
``Sixty or seventy years back.

3-back off (STOP) phrasal verb INFORMAL
to stop being involved in a situation, usually in order to allow other people to deal with it themselves:
- She started to criticize me, then she suddenly backed off.
- Just back off and let us do this on our own, will you?

4- Back taxes
Due taxes that have not been paid on time.
Have To Pay Back Taxes?

5-backdate make effective from an earlier date;
"The increase in tax was backdated to January"

5-backdate verb {T}
to make something, especially a pay increase, effective from an earlier time:
- They got a pay rise in March which was backdated to January.

6- in the background (THINGS BEHIND) noun
1 {S} the things that can be seen or heard behind other things that are closer or louder:
a sound that is in the background is present but is not the main thing that you
are listening to.
- The little figure that you can just see in the background of the photograph is me.
- If you listen carefully to this piece of music, you can hear a flute in the background.
- We couldn't hear what they were saying on the tape - there was too much background noise.
• A television was on in the background

7-backlog
a large amount of things that you should have done before and must do now:
- I've got a huge backlog of work to do.
• a large backlog of orders

8-back-to-back (CONTINUOUS) adjective {before noun}, adverb
happening one after another, without interruption:
- Coming up after the break, three Rolling Stones classics back-to-back.
- Schumacher is celebrating back-to-back victories in the French and British Grand Prix.

9-back-to-back (CLOSE TOGETHER) adjective {before noun}, adverb
close together and facing in opposite directions:
- UK back-to-back terraced houses
- The office was full of computers, and we had to sit back-to-back in long rows.

10-backtrack verb {I}
1 to go back along a path you have just followed:
- We went the wrong way and had to backtrack till we got to the right turning.
2 to say that you did not mean something you said earlier or say that you have changed your opinion:
- {+ speech} "All right, " he backtracked, "It's possible that I was mistaken."
- The officers were forced to backtrack on their statements.
- She refused to backtrack from her criticisms of the proposal.

11- say back : once again:
• Play the tape back for me, okay?
• I'll check back with you sometime next week.

12 -be in the bag INFORMAL
If something is in the bag, you are certain to get it or to achieve it:
- Once we'd scored the third goal, the match was pretty much in the bag.

13 bag ( verb) SPOKEN to decide not to do something:
• I'm tired of waiting. Bag this - I'm leaving.

14- on bail money left with a court of law to prove that a prisoner will return when their TRIAL starts:
• Harrell will be released on bail (= let out of prison when bail was paid) until his trial.
• Carpenter is free on bail while he appeals his conviction.

15- take the bait
something used to make someone do something, buy something etc., especially done in a way to deceive people:
• Plenty of people took the bait (= accepted what was offered) and ended up losing their life savings.

16- hang in the balance to be in a situation in which the result is not certain, and something bad may happen:
• World leaders are meeting to discuss the situation, with peace in the region hanging in the balance.

17- to balance [I,T] to be equal to something else in weight, amount, or importance, or to try to give something equal importance:
• They asked state officials to balance giving jobs to men and women. [balance sth with sth]:
• It's not always easy to balance a career with a family.

18- on the ball INFORMAL thinking or acting quickly and intelligently:
• A photographer who was on the ball got some great pictures of the incident.

19- in the (right) ball park INFORMAL close to the amount, price etc. that you want or are thinking about:
• The chief financial officer said that analysts' profit estimates are in the right ballpark.

20- baloney noun [U]
1 INFORMAL something that is silly or not true; nonsense
2 NONSTANDARD BOLOGNA

sound like also sound as if/though used to say that someone or something seems a particular way to you:
• Nick sounds like a nice guy. Will we get to meet him soon?
• He sounded like he had a cold or something.
bunchnoun [C] Spoken: 1000
[usually singular] a large number of similar things, or a large amount of something:
• The doctor asked me a bunch of questions.

21- the bane of my existence. (= a cause of continual trouble)
This stupid computer has become the bane of my existence. (= a cause of continual trouble)

22- get a bang out of sth SPOKEN to enjoy something very much:
• She got a real bang out of seeing the kids in the school play.

23- bang adverb
1 INFORMAL directly or exactly:
• It starts at eight, bang on the dot.

24- size sb/sth up phrasal verb [T]
to look at or consider a person or situation and make a judgment about them:
• They stood at opposite sides of the room, sizing each other up.

25- try sth on for size
a) to put on a piece of clothing to see if it fits
b) INFORMAL to consider something to see if it is appropriate for you or your situation:
• Tell the school board to try this idea on for size: we could hold classes on buses.