Pg 131, 132

It's all in your head

Only your imagination

It's Greek to me

Incomprehensible // I cannot understand anything

It's not rocket science

Used to say that you do not think that something is very difficult to do or to understand

It's Raining cats and dogs

Raining extremely heavily // A very heavy downpour

Ivory towers

Detachment and seclusion // imaginary world // to have no knowledge or experience of the practical problems or everyday life

Jaundiced eye

A prejudiced view

Jog someone's memory

To cause someone to remember something

Judas kiss

Deceitful pretence of friendship

Jump the gun

Start something too soon or act hastily // said it before it was the right time

Jumping down my throat

Scolding

Kangaroo court

False court that doesn't follow the legal standards

Keep a civil tongue

Speak with great politeness

Keep a low profile

To avoid attracting attention to yourself

Keep a straight face

Not laugh or change your expression even though you want to laugh

Keep abreast of

Keep oneself updated

Keep an ear to the ground

Staying informed and updated about everything

Keep at arm's length

To be at a distance with someone // Avoid being friendly with someone

Keep count of

To remember a total

Keep in check

To control something

Keep in touch

To maintain contact with another person

Keep one's head

Remain calm

Keep one's word

To uphold one's promise

Keep someone in the loop

Give them all the information

Keep someone posted

Keep sharing the latest information

Keep the ball rolling

To maintain progress

Keep under one's hat

To keep something a secret

Keep up appearances

To pretend to be happier or richer so as to conceal the real situation

Keep up with the Joneses

Strive to match one's neighbors in spending and social standing

Keep your chin up

Remain cheerful and hopeful in difficult circumstances

Keep your shirt on

To remain cool

Keep your wig on

To calm down

Keep/hold something at bay

To control something and prevent it from causing you problems // Prevent someone from moving closer

Keeps an open house

Welcomes all members

Kept a level head

Was sensible

Kept a stiff upper lip

Remained expressionless

Kick someone when they are down

To cause further trouble to someone already in a difficult situation

Kick the bucket

To die

Kicked up a row

Made a great fuss // cause a disturbance

Kicking his heels

Wasting time

Kill two birds with one stone

To serve two purposes at one time // To achieve two results with a single effort

Kith and kin

blood relatives

Kitty-corner

Things located diagonally opposite each other

Knock down

To demolish

Know like the back of one's hand

to have detailed knowledge of something

Know something inside out

To know everything about something // To know something thoroughly

Knows how many beans make five

Well informed and intelligent

Laid down their arms

Surrendered

Lap up

Accept eagerly

Large-hearted

Generous

Last but not least

Last in order of mention or occurrence but not last in importance

Latched on to something

To become firmly attached

Late in the day

Too delayed to be of any use