a cat and dog life an unhappy and full of quarrels life: Almost since the first day, he had been living a cat and dog life with his wife.
a catnap a short sleep: If I could take a catnap now, I probably would feel much better later on.
a chicken hearted man a coward person: He is a chicken-hearted man, and still afraid of the dark.
a cuckoo in the nest an unwelcome person in a group: Eric always got good grades, so his unruly peers see him as a cuckoo in the nest.
a fish out of water uncomfortable because you are in an unusual or unfamiliar situation: Anthony felt like a fish out of water when he met his girlfriend’s parents.
ahead of the pack more successful than those people you are competing with: This kind of technic will keep you ahead of the pack.
a lame duck a person or thing that is disabled, helpless or in trouble and needs help: Lucy always has to have a lame duck to look after.
a little bird told me when you do not want to reveal the source of the information: How did you find out it was my birthday?
all bark no bite all talk and no action: Ezra looks like a gangster but, he is all bark and no bite.
alley cat a homeless cat: I once fed an alley cat and now it comes to my house every day.
a chicken and egg situation said when it is difficult to tell which one of two things was the cause of the other: You need experience to get a job, but you need a job to get experience.
a fly on the wall an unnoticed observer or listener: I love to be a fly on the wall during the negotiations.
in the second place