1) Rank And File-the ordinary members of an organization as opposed to its leaders-
The party's rank and file are beginning to question the prime minister's choice of advisers.
2) Part And Parcel-something that cannot be separated from a condition or activity-
Being recognized on the street is part and parcel of being a celebrity.
3) Kith And Kin-friends and relatives, people known to someone-
I was delighted to find all my kith and kin waiting for me at the airport to welcome me home.
4) Heart And Soul-devotedly-
She loves those children heart and soul.
5) Over Head And Ears-excessively, completely -
They were over head and ears in debt.
6) Null And Void-having no legal force-
The change in the law makes the previous agreement null and void.
7) The Ins And Outs-the detailed or complicated facts of something-
I know how to use computers, but I don't really understand the ins and outs of how they work.
8) Be At Your Wits' End-to be so worried, confused, or annoyed that you do not know what to do next-
I am at my wits' end. I don't know how to help him.
9) Drag Your Heels/feet-to do something slowly because you do not want to do it-
I suspect the management is dragging its heels on this issue.
10) Throw Your Weight Around-to act as if you have a lot of power or authority, be unpleasantly self-assertive-
The district manager came to our office and tried to throw his weight around, but no one paid any attention to him.
11) A Bitter Pill To Swallow-something that is very unpleasant but must be accepted-
Losing to a younger player was a bitter pill to swallow.
12) Have An Axe To Grind-to have something to complain about, to have a selfish reason for saying or doing something, to have a strong opinion about something that influences your actions-
Environmentalists have no political axe to grind - they just want to save the planet.
13) In Fits And Starts-with irregular bursts of activity-
The economy was recovering in fits and starts.
14) A Stone's Throw Away-a short distance-
The lodge is within a stone's throw of the ski slopes.
15) Snake In The Grass-a secret enemy-
Ben secretly applied for the same job as his best friend; no one knew he was such a snake in the grass.
16) Be Like A Red Rag To A Bull-to be certain to produce an angry or violent reaction-
You do realize that bringing your new girlfriend to your ex-wife's house is like a red rag to a bull, right?
17) A Lion's Share-the largest part of something-
A lion's share of the museum's budget goes on special exhibitions.
18) Have Feet Of Clay-a fundamental flaw or weakness in a person otherwise revered-
Some of the greatest geniuses in history had feet of clay.
19)Live In A Fool's Paradise-be in a state of enjoyment based on false beliefs or hopes, a state of illusory happiness-
Fred is confident that he will get a big raise this year, but I think he is living in a fool's paradise.
20) A Feather In Your Cap-an achievement to be proud of-
It's a real feather in our cap to be playing in the state championship.