Put the cat among the pigeons
To cause trouble
Clumsy
to have bigger fish to fry
To have more important things to do
To feel hungry
Let the cat out of the bag
To tell a secret
to be angry
The cat who got the cream
a bad cat
a happy cat
The final straw that broke the camel's back
The final problem that makes everything seem impossible
Carrying a heavy object
To have a flea in the ear
to be told off
to have an itchy ear
As pleased as a dog with two tails
unhappy
Very happy
To be like a bull in a china shop
to be clumsy
to be happy
Like a bear with a sore head
To be ill
To be angry
a dog's life
a hard life
an easy life