A
B
C
D
E
100

-  -EE IN  --  B-NN--.

A certain, specific issue that is annoying someone.

A bee in my bonnet

100

-DD  I--U-T -O  I-J--Y. 

Make something already bad worse. For example, a guy fell off his bike but then a car ran over his foot.

Add insult to injury

100

A --RD  -U-  T-  -RA--.

Someone who is difficult to get to know.

A hard nut to crack

100

H-- t-- B---S

Study.


Hit the books

100

-EE  E-E  --  E-E

Agree with someone.

See eye to eye

200

-OO- F-- TH---HT

Something to think about.

Food for thought

200

B-- B---S

To have a very high salary.

Big bucks

200

S--O-D N---R-

Something that someone does easily and well because they have done it so often. 

Second Nature

200

I-  T--  R-D

Losing money

In the red

200

- P---E -- C---

Something that's easy to do.

A piece of cake

300

S--R--K--IN-

Increasing rapidly

Skyrocketing

300

AH--D  -f  -H-  P---.

To be ahead of other people or companies trying to do a similar thing.

Ahead of the pack


300

-ON-- T-  B---

Extra money to spend freely. 

Money to burn

300

T--D-  I-

Exchange something old, usually for a newer thing. 

Trade in

300

A- -PP-- A --- K---S  --- D--T-- A--y

Eating healthy keeps you from getting sick.

An apple a day keeps the doctor away


400

A-  ---  A-  I  ---  T-LL

To the best of my understanding.

As far as I can tell

400

B--KB----R

Leave something for now and deal with it later.

Backburner

400

-S  F--  A-   A   F-DD--

In great shape.

As fit as a fiddle


400

-  S---m  --  B--W--G

Difficulty or danger is expected in the future.

A storm is brewing


400

T--  B---  O-   B---  W----S

Getting the benefits of two things at the same time.

The best of both worlds

500

A  ---  O-  -Y  P---E

Many responsibilities.

A lot on my plate


500

A -OU-- P--L   T-  -W----W

Something difficult to get over or accept. 

A tough pill to swallow

500

H--  T--  -R--ND R---IN-

Start something and make progress quickly on it.

Hit the ground running

500

A-  t--  e-e----h  ---r

At the last minute.

At the eleventh hour


500

-  D--E  -  D-Z--.

Something that is very common; not special.

A dime a dozen