a road hog
a driver whose car goes all over the road
a can of worms
a situation that causes a lot of problems for you when you start to deal with it
poles apart
completely opposite
Break a leg
wishing good luck
a monkey business
silly or foolish things happening
back-to-front
when something is turned around from the normal position or orientation
Up in the air
something that hasn't been done yet
to add insult to injury
to make an argument or a bad situation even worse
a bed of roses
an easy and happy existence
Put all eggs in one basket
to depend for your success on a single person or plan of action
to fall head over heels for
to be completely in love with smb
Kill two birds with one stone
to be able to do two thing at once
hit the roof
get angry
a blessing in disguise
something that seems bad or unlucky at first, but results in something good happening later
As cool as a cucumber
very calm or very calmly, especially when this is surprising
to pay an arm and a leg
pay a lot of money
Piece of cake
something very easy
to pop the question
to ask someone to marry you
to be in a pickle
to be in trouble, have problems
Bring home the bacon
earn money
Hit the hay
go to sleep
to beat around the bush
to avoid talking about what is important
to judge a book by its cover
to make a hasty conclusion about something or someone judging only by its appearance
puppy love
the first romantic love that a young person feels for someone else
to tie the knot
to get married
to be sick as a dog
to be seiously ill