The idiom "by hook or by crook" means to accomplish something using any means necessary, even if it's not the most ethical or legal way to do so. It suggests that someone is willing to take shortcuts and bend the rules to achieve their goals.

The idiom "on the crest of a wave" means to be at the peak or high point of success, popularity, or fame. It refers to being at the top of one's game and riding the momentum of success.

The idiom "meet halfway" means to agree or reach a mutual understanding on a compromise that meets each person's needs equally, without one party feeling like they have given more than the other.

The idiom "over my dead body" is an expression used to convey strong opposition or refusal to something. It means that the speaker would rather die than accept the thing that is being proposed, as it goes against their beliefs or values.

The idiom "baby blues" refers to feelings of sadness, anxiety, or depression that a new mother may experience after giving birth. It is not related to any medical condition but rather a common emotional experience that many women go through in the first few weeks after delivery.