The idiom "the pen is mightier than the sword" means that words, or writing, have more power and influence than physical force or violence. The phrase suggests that non-violent communication can be just as effective, if not more so, than using weapons.

The idiom "Black Friday" refers to the day after Thanksgiving in the United States when there are typically large sales and discounts on many items. It is commonly associated with the beginning of the holiday shopping season.

The idiom "take it up/down a notch" means to increase or decrease something by a small amount, usually to make it more challenging or less difficult. It is often used when describing a physical change, such as increasing the speed of an object or reducing the volume of sound.

The idiom "curiosity killed the cat" is a figurative expression that means an innocent person or thing may be harmed because someone has become too curious or inquisitive about it.

"Foot the bill" means to pay for something, usually a large amount of money, often without being asked to do so or expecting reimbursement. It can also mean to take responsibility for an action or decision, or to be held accountable for one's mistakes.