clean as a whistle

Let the cat out of the bag

be born with a silver spoon in your mouth

burn the midnight oil

call a spade a spade

get the wrong end of the stick

rain cats and dogs

a leopard can't change its spots

out of this world

turn over a new leaf

see eye to eye (with sb)

on good terms (with)

not have a leg to stand on

wet blanket

kick youself

make (both) ends meet

get on like a house on fire

the prime of life

add fuel to the fire

for a song

worth its weight in gold

open a can of worms

to be as brown as a berry

hit the books

full of beans

sail close to the wind

no skin of my nose

turn a blind eye

drive someone insane

where there's a will, there's a way

the early bird catches the worm

give lip service to

have a change of heart

out of the blue

dead beat

at a low ebb

sell somebody down the river

make a night of it

have egg on one's face

upset the applecart

have a second bite at the cherry

work against the clock

to put something on the back burner

teething troubles

in deep water

on easy street

over the moon

get cold feet

have a bee in your bonnet

hopping mad

put your best foot forward

have other fish to fry

well and truly