it's dog eat dog
it's not my cup of tea
nothing but blue skies
once in a blue moon
pie in the sky
to be at the end of one's rope
to be on one's last legs
to be on top of the world
to be out of the woods
to be over the moon
to be wet behind the ears
to bend over backwards
to bite the dust
to cry wolf
to face the music
to go to the dogs
to have up your sleeve
to hold the fort
to keep under your hat
to know the ropes
to let the cat out of the bag
to make a mountain out of a molehill.
to make a storm in a teacup
to play by ear
to scratch someone's back
to sell like hot cakes
to smell a rat
to spill the beans
to take someone's breath away
to take the bull by the horns
to tell a tall tale
to walk tall
you scratch my back and I'll scratch yours