sick as a dog - feeling very very sick
You look sick as a dog.
raining cats and dogs – heavy rain
It is raining cats and dogs out side, I hope the rain stops soon.
fight like cats and dogs – consistently fighting with each other
The kids fight like cats and dog all the time.
it's a dog life – a hard life
I work, learn and have to take care of the house, it's a dogs life.
every dog has its day – everyone gets lucky sometimes
Don't feel bad you lost the game, every dog has it's day.
work like a dog – works hard
The boys are working like dogs today.
teach old dog new tricks – teach someone old, something new
You can't teach an old dog a new trick.
barking dogs never bite – someone that makes a lot of noise but takes no action
They are just barking dogs that never bite don't worry about them.
all bark no bite - someone that makes a lot of noise but takes no action
The lady on at the end of the block is all bark no bite.
underdog – the one that is weaker or less chance of winning
I always want the underdog to win the Super Bowl.
top dog – boss or leader
Mary is the top dog of our team.
a doggy bag – a bag that you put leftover food usually from a restaurant
If you can't finish your food it's OK you can take home a doggie bag.
his bark is worse than his bite – someone sounds worse then they really are
Don't listen to that guy in the store his bark is worse then his bite.
let sleeping dogs lie – do not bring up a subject that might cause trouble
Don't talk to your sister about her house, let sleeping dogs lie.
in the doghouse – usually is used when a man upsets his wife
I came home late, and now I am in the doghouse.
see a man about a dog - to leave and not say where your going
Where is Jeff? He went to see a man about a dog.
barking up the wrong tree - arguing with the wrong person
That lady was barking up the wrong tree, I do not know anything about what she was talking about.
call off the dogs – it is commonly used when someone is being yelled at or attacked by more then one person
Hey, what did I do call off the dogs, and calm down.