1- A skeleton in the cupboard:
Meaning: a past event or fact which is kept secret ( usually something embarrassing or shameful)
Sentence: An ideal leader must have an immaculate past record, but most people have a skeleton in the cupboard somewhere ..
2- To monkey with:
Meaning: to bother or interfere with someone or something
Sentence: Come on, don't monkey with my new camera. Don't mess with me unless you want trouble.
3- To talk through one's hat
Meaning: talk foolishly or ignorantly
Sentence: What he said was nonsense. He was talking through his hat again ..
4- Bag of bones
Meaning: an extremely skinny person or animal with bones showing.
Sentence: She has lost so much weight that she's turning into a bag of bones ..
5- Hotchpotch
Meaning: A jumbled or confused mixture, a motley assortment of things
Sentence: A badly written essay contains hotchpotch errors ..
6- Out and out
Meaning: Complete, thoroughgoing
Sentence: To claim that one doesn't lie at all is an out and out lie ..
7- Figure head
Meaning: A person given a position of nominal leadership but having no actual authority.
Sentence: Ban Ki Moon is no more than a figurehead in the UNO ..
8- Underhand
Meaning: Marked by or done in a deceptive, secret, or sly manner; dishonest and sneaky.
Sentence: India claims that Pakistan is sponsoring terrorists with an underhand movement ..
9- Honourable mention
Meaning: A citation to one who has performed well in a competition but has not been awarded a prize.
Sentence: The top most student gained much popularity, while the other position holders remained honourable mentions ..
10- Topsy-turvy
Meaning: With the top downward and the bottom up; upside-down.
Sentence: The fight against terrorism has turned the ordered lives of our people topsy-turvy ..
11- Zig-zag
Meaning: Having short sharp turns or angles, not straight or aligned.
Sentence: Its hard to drive on a zig zag road.
12- Small fry
Meaning: Persons or things regarded as unimportant.
Sentence: Government regards family business as small fry, no matter how significant they are for economy ..
13- Rub shoulders with
Meaning: to meet or be with someone socially
Sentence: The conference offered a chance for business people to rub shoulders with business people from other countries.
14- Immanent
Meaning: Existing or remaining within; inherent
Sentence: Belief in God is immanent in humans.
15- A good samaritan
Meaning: someone who tries to help people who have problems
Sentence: He's such a good samaritan. He used to help others in finding idioms ..
16- Look askance (at)
Meaning: To be surprised or shocked at someone or something.
Sentence: The teacher looked askance at the student who had acted so rudely.
17- Between scylla and charybdis
Meaning: In a position where avoidance of one danger exposes one to another danger.
Sentence: Pakistan is between scylla and charybdis in the war against terrorism. If the U.S leaves Afghanistan, Pakistan will have to fight alone.
18- To sound the alarm
Meaning: To notify or let someone know about something
Sentence: The recent petrol price hike clearly sounds the alarm of higher inflation.
19- To put up with
Meaning: To tolerate
Sentence: I can't put up with my neighbour's noise any longer, its driving me mad.
20- To strain at the gnat and swallow a camel
Meaning: make a big to-do out of the little things and let the big things escape.
Sentence: Often social injustice is done when the people strain at the gnat and swallow a camel.
Enough for now ..
Will find others as well InshaAllah ..
Corrections will be appreciated ..
Regards ..