It's raining cats and dogs.
It is raining heavily.
sweet tooth
crave something sweet
see eye to eye
to agree or have the same opinion
break a leg
good luck
rain check
to be completed at a later date
throw in the towel
to give up or quit
a piece of cake
something that is easy
ants in your pants
to be fidgety
hold your tongue
do not say anything
zip your lips
Stop talking
let the cat out of the bag
to reveal a secret
under the weather
feeling sick or unwell
break the ice
to start a conversation or ease tension
left out in the cold
leave somebody out, exclude
clear as mud
something that is confusing
the elephant in the room
an obvious thing that noone is talking about
once in a blue moon
something that happens rarely
wear your heart on your sleeve
to show your emotions easily
bite off more than you can chew
try to do too much at one time
shift gears
to change what you are doing suddenly
hold your horses
ask someone to wait or slow down
cost an arm and a leg
very expensive
barrel of laughs
someone is funny
gave me the slip
get away from someone
cry wolf
lying