Something that is very easy to do.
Piece of cake
Means "continue".
Carry on
Huge
Large
It describes someone who is very happy because something good is happened / will happen.
Excited
"100 % of the time"
Always
Gossip / To reveal a secret that was meant to be kept private.
Spill the beans / tea
Means "stop trying".
Give up
Begin
Start
It describes someone who does not understand something or does not know what to do.
Confused
"About half the time or occasionally"
Sometimes
To start a conversation or make people feel more comfortable in a social situation.
Break the ice
Means "reject / say no to an offer".
Turn down
Clever
Smart
It describes someone who is very tired after a lot of work or activity.
Exhausted
"Many times, but not every time"
Often
To be very expensive.
Cost an arm and a leg
Means "invent a fake story or excuse".
Make up
Silent
Quiet
It describes someone who feels nervous or worried about something that may happen.
Anxious
"Almost always, but not 100 % of the time"
Usually
To decide what to do as a situation develops, rather than making a plan in advance.
Play it by ear
Means "discover by chance".
Come across
Bravery
Courage
It describes someone who is unhappy because something did not happen the way they wanted.
Disappointed
"Not often, only a few times"
Rarely