It means not eating your vegetables.
At least in the poem "Where do all the teachers go?" by Peter Dixon
may be it means to leave green leaf inside a book.
Friend greens
It means: to leave one's inexperienced/genuine/innocent/sober/cultured ways and become matured or adulterated or cunning.
Something that eats meat and greens.
If by greens you mean plants. Yes, they use them extensively.
'Greens' as a general term applies to both vegetables and fruits. Cabbages are vegetables, beans are fruits. On this subject you need to specify what you mean by 'greens'
The best greens to feed a turtle are collard greens, mustard greens and kale.
The Green Beans Green Warriors The Mean Greens The Mean Green Team
There is no standard collective noun for the noun greens, in which case a noun that suits the situation can be used; for example a bunch of greens, a bowl of greens, an expanse of greens, etc.
Another name for these greens is called SandFire greens
I think you mean..."BY leave of the court." It means, "with the court's permission."
It is just a wee golf joke, clearly hilarious. The green is where players make their money, you hit the green and make the putt. Hitting more greens should mean less strokes, unless you are a horrendous putter.