green around the gills

- looking sick
My friend looked green around the gills after the long bus ride.
green belt

- an area of fields and trees around a town
Our city has a policy to increase the green belt around the city.
green-eyed monster

- jealousy
The woman was consumed by the green-eyed monster and it was affecting her life.
green thumb

- a talent for gardening, the ability to make things grow
My neighbor has a green thumb and she is able to grow one of the best gardens in our neighborhood.
green with envy

- to be very jealous, to be full of envy
I was green with envy when I heard that my cousin would be going to London for a week.
greenhorn

- an untrained or inexperienced or naive person
The young man is a greenhorn and he has much to learn about his new job.
have the green light

- to have a signal to start or continue something
The company finally has the green light to start the project