A fly in the ointment
Dog tired
A bee in your bonnet
To rat on somebody
Crocodile tears
Hen pecked
You can't teach an old dog new tricks
Don't count your chickens before they hatch
Bear with a sore paw
Have a whale of a time
Cold turkey
Someone in a bad mood.
Husband who is nagged at by his wife.
Have an exciting, interesting time. Enjoy oneself enormously.
One big problem in an otherwise faultless plan.
Don't presume anything until it is certain.
False tears to give impression of sadness.
Period of time without something you are addicted to.
Extremely tired.
Someone who is too accustomed to old habits won't want to change.
Be angry, resentful about a certain issue.
Tell a person in authority about the bad behaviour of another person.