The idiom "turn back on" means to reverse or undo a previous decision, action, or behavior. It can also refer to rejecting or refusing something, such as a request or proposal.

The idiom "in tandem" refers to two or more people working together as a team, often with equal responsibilities and roles. This can be used to describe a group of friends, co-workers, or even strangers who are united by a common goal.

The idiom "feather one's own nest" means to take care of oneself or one's own interests, usually by doing something that benefits oneself personally. It can also mean acting selfishly or putting oneself first, often at the expense of others.

The idiom "zip your lip" means to be quiet or stop talking, especially when someone is asking you to. It can also mean to close one's mouth or to not say anything. The figurative meaning of the idiom is to shut up and not make any unnecessary noise or distractions.

"Wear heart on sleeve" is an idiom that means to show one's true feelings openly and without any hesitation. The phrase implies that the person wearing their heart on their sleeve is being vulnerable and honest about their emotions, making it easy for others to read them.