The idiom "down the drain" is used to describe something that has gone wrong or something that is lost forever. It can also be used to describe something that is no longer useful or valuable. The figurative meaning of the phrase is that it's gone for good, there's no coming back from it.

The idiom "all bark and no bite" refers to someone or something that is all talk but lacks substance. It suggests a lack of action or follow-through, and can be used to describe people who are overly critical or negative without providing any constructive feedback or solutions.

The idiom "pour cold water on" means to ruin someone's plans or destroy their mood by introducing an unpleasant or unwanted element into the situation. It is used to express disappointment, frustration, or a desire for something more positive or agreeable.

A "ballpark figure" is an approximate or rough estimate of something, typically given without precise measurements or calculations.

The idiom "hard and fast" generally means something that is done quickly, easily, or efficiently. It can also refer to a situation that is urgent or immediate.