The idiom "jump to conclusions" refers to making a decision or forming an opinion without having enough evidence or information. It is a hasty and impulsive action that can lead to incorrect judgments or misconceptions.

The idiom "top dog" is a common expression used to describe someone who is the best or most respected among their peers. It can also refer to someone who is in charge, has power, or is highly influential.

The idiom "in the buff" refers to being completely naked or wearing nothing, usually in a non-sexual context. It can also mean being dressed in minimal clothing or revealing clothing.

The idiom "weak in the knees" means to feel nervous, anxious, or uncertain about something. It can also mean being physically weak or feeble. The phrase has a figurative meaning that is commonly understood as an emotional state, rather than a physical one.

The idiom "pitch in" means to contribute or take part in something enthusiastically, especially when doing so is not required or expected. It can also mean to help out or cooperate with others, often for a common goal.