The idiom "till doomsday" means something will last for a very long time, until it becomes unbelievable or impossible to continue. It is often used to describe an extreme amount of time that someone would be willing to wait for something to happen.

The idiom "keep your hair on" is a phrase used to encourage someone to stay calm, collected, and focused during a stressful or difficult situation.

The idiom "New York minute" is used to describe a very short amount of time or an instantaneous action that happens quickly or without warning. It's often used to express surprise or amazement, and can also convey a sense of urgency or quickness.

The idiom "red flag" refers to a situation, event, or person that should be considered potentially dangerous or problematic. It can also indicate a warning sign that something may go wrong or that caution is needed.

The idiom "too close to call" means that it is difficult to determine the outcome or result of a situation, as it is uncertain or ambiguous. It can also mean that something is very close to happening or occurring.