Piece of cake
a task/job that is easy to complete
Pulling someone's leg
joking with them
Like two peas in a pod
Two people who are always together
Run like the wind
to run very fast
Busy as a bee
To be very active and working hard at something
Raining cats and dogs
Raining very hard
Sleeping like a log
Sleeping very soundly
When pigs fly
Something that is impossible
