Idioms for daily use (K)

Keep at bay
If you keep someone or something at bay, you maintain a safe distance from
them.
 

Keep body and soul together
If you earn enough to cover your basic expenses, but nothing more than that,
you earn enough to keep body and soul together.
 

Keep in touch
If you keep in touch with someone, you keep communicating with them even
though you may live far apart.
 

Keep it on the Q T
If you keep something on the Q T, you keep it quiet or secret.('Q-T' is also used.)
 

Keep it under your hat
If you keep something under your hat, you keep it secret.
 

Keep mum
If you keep mum about something, you keep quiet and don't tell anyone.
 

Keep posted
If you keep posted about something, you keep up-to-date with information and
developments.
 

Keep someone at arm's length
If you keep someone or something at arm's length, you keep a safe distance
away from them.
 

Keep someone on their toes
If you keep someone on their toes, you make sure that they concentrate on what
they are supposed to do.
 

Keep the wolf at bay
If you keep the wolf at bay, you make enough money to avoid going hungry or
falling heavily into debt.
 

Keep up with the Joneses
People who try to keep up with the Joneses are competitive about material
possessions and always try to have the latest and best things.
 

Keep your chin up
(UK) This expression is used to tell someone to have confidence.
 

Keep your cool
If you keep your cool, you don't get excessively excited or disturbed in a bad
situation.
 

Keep your ear to the ground
If you keep your ear to the ground, you try to keep informed about something,
especially if there are rumours or uncertainties.

Knight in shining armour
A knight in shining armour is someone who saves you when you are in great
trouble or danger.
 

Knit your brows
If you knit your brows, you frown or look worried.
 

Knock 'em dead
'Knock 'em dead' is used as a way of wishing someone luck before they give a
performance or have to appear before people, as in an interview, etc. ('em =
them)
 

Knock on wood
This idiom is used to wish for good luck. ('Touch wood' is also used.)
 

Knock something on the head
If you knock something on the head, you stop it or stop doing it.
 

Knock the pins from under someone
If someone knocks the pins from under you, they let you down.
 

Knock your block off
To punch someone in the face Eg : The next time you do something like that I'm
going to "knock your block off".
 

Knock your socks off
If something knocks your socks off, it amazes and surprises you, usually in a
positive way.
 

Know a hawk from a handsaw
If someone knows a hawk from a handsaw, they are able to distinguish things
and assess them.
 

Know full well
When you know full well, you are absolutely sure that you know.
 

Know the ropes
Someone who is experienced and knows how the system works know the ropes.
 

Know where all the bodies are buried
Someone who by virtue of holding a position of trust with an organization for a
long period of time has come to know many of the secrets that others in more
powerful positions would rather be kept secret knows where the bodies are
buried. An implication is that the person knowing these secrets will use that
knowledge to secure something of value for him- or herself.
 

Know which side one's bread is buttered on
If you know which side one's bread is buttered on, you know where your
interests lie and will act accordingly to protect or further them.
 

Know which way the wind blows
This means that you should know how things are developing and be prepared for
the future.
 

Know your onions
If someone is very well-informed about something, they know their onions.