He is down to earth.
He is easy to talk to
He is visiting from Mars
Go with the flow
Swim downstream
Do whatever everyone else agrees with
She was feeling under the weather last week.
She was laying under a cloud
She was sick
He was green with envy
He was very jealous
He was nauseous
Money doesn't grow on trees
It takes a lot of work to earn money
Money isn't a plant
He is barking up the wrong tree.
He is making noise
He is trying to get something that won't happen
Calm before the storm
Peaceful period before difficulty
Sunny day before it rains
Tip of the iceberg
The top part of a chunk of ice
The only noticeable part of a bigger problem
There is nothing like it on Earth
It doesn't exist anywhere
So incredible that there is nothing else to compare it to in
He felt like he was pushing a rock up a hill
He was doing a lot of work but not making progress
The rock kept falling on him
Sometimes you have to ride out the storm
You have to wait for hard times to be over
You have to ride in a boat when theres a flood
Her niece is a ray of sunshine.
Her niece brings happiness
Her niece is shiny
The apple doesn't fall far from the tree
When a child looks/acts like their parent
Apples fall because of gravity
The grass is always greener on the other side
Other people's situations seem better than yours
Your neighbor has a better lawnmower
When he came home late, he was in hot water
He was in a lot of trouble
There was a flash flood
Don't beat around the bush
Don't hit the bushes
Get to the point