Every Saturday I’ll give you a couple of idioms to learn. An idiom is a saying or phrase whose meaning cannot be taken from the literal meanings of the words.
throw someone to the wolves: send someone into danger without protection
Example:
Do you think your friendship with Dave will save your job? He wouldn’t hesitate to throw his own grandmother to the wolves, so you can bet he’s not going to lose any sleep over your situation.
turn tail: run away from trouble or danger
Example:
When the school bully heard that Jack was taking karate lessons, he turned tail and didn’t harass him anymore.