The idiom "get under someone's skin" means to annoy or irritate someone so much that they become upset, angry, or uncomfortable. It can also mean to get someone to do something by making them feel uneasy or guilty.

The idiom "a dime a dozen" means that something is very common, easily available or abundant. It suggests that the item is so widely distributed that it's almost like you could buy it for a dime (a low price) if it was still valuable.

The idiom "red herring" refers to something that is introduced or presented as a distraction from the main issue or problem being discussed. It is often used to refer to a false lead or a diversion that is meant to confuse or mislead people.

The idiom "cat among the pigeons" refers to someone who stirs up trouble or causes chaos in a group of people. It can also mean that someone is causing problems or disturbing the peace in a community or society.

"Divide and conquer" is an idiom that means to divide a problem or task into smaller parts and then solve each part individually. This approach can be used to tackle complex tasks by breaking them down into more manageable ones.