Raining cats and dogs
Raining very heavily
High as a kite
to behave in a silly or excited way OR greatly affected by alcohol or drugs
Piece of cake
easy
Be all ears
to be waiting eagerly to hear about something
Hit the hay
to go to bed in order to sleep
Cry wolf
false alarm
On the fence
undecided or unable to choose between two or more options
Baker's dozen
13
good luck
New York Minute
an extremely short period of time, an instant, or a flash
High on the hog
living luxuriously
Between a rock and a hard place
to be in a very difficult situation and to have to make a hard decision
Cry over spilled milk
to waste time feeling sorry about an earlier mistake or problem that cannot be changed
Bite your tongue
to stop yourself from saying something offensive, hurtful or inappropriate
Be dropping like flies
be dying in large numbers within a short period of time
A leopard can't change his spots.
People cannot change their basic personalities, habits, etc.
Dog days of summer
the hot, sultry days of summer
The best thing since sliced bread
extremely good; to be an excellent person or thing
Cast-iron stomach
used to describe someone who can eat all kinds of things without ever feeling sick
Head over heels
completely in love with another person
Like a chicken with its head cut off
someone who is panicking or acting in a crazy way
Have a field day
to get a lot of pleasure and enjoyment from doing something —used especially to describe getting enjoyment from criticizing someone
The apple of my eye
the person who someone loves most and is very proud of
Put your foot in your mouth
to say something by accident that embarrasses or upsets someone
Icing on the cake
something that makes a good situation even better