"watch each other's back"

Hi,

again I'm not sure about an expression, though I suppose the meaning must be something like 'care for each other'.

The context: A woman was abandoned by her husband, her girl friends try to console her, and one of them says:

"We've all been there. The picket fence routine is a lot harder than it looks. That's whay we've to watch each other's backs."

Thank you very much in advance, Luce

It definitely has the sense of protecting each other from danger. Someone can attack you from behind - so someone watches your back.  You might hear someone say "I've got your back" which means "I'm making sure you don't get harmed." The harm, of course, is not usually a physical attack, but perhaps emotional harm.  (Unless you're watching a crime show. Then it does mean "I'll make sure no one shoots you from behind.)

So to "watch each other's back" means they are all looking out for one another to try to make sure no one gets hurt.

can proficients give more examples of metaphors , similarism or idioms.

especially in compositions they give tremendous effect  to our writing.i try to use some of them in my compositions as well but with my poor knowledge i think i repeat myself with cliches.

to draw blood from stone, as cunning as a fox, eats like a pig,grow like a roofs of tree and etc.

i ll be obliged if you give me more such beauties of english

regards