The idiom "just deserts" refers to a situation where someone gets what they deserve, often in the form of punishment or reward. It is a metaphorical expression that suggests that everyone should receive what they have earned based on their actions or behavior.

The idiom "a shot in the dark" means taking a risk or making an attempt without any certainty of success, especially when there are no other viable options available.

The idiom "double take" refers to the act of taking a second look or giving a second thought to something that has initially caught one's attention. It can also mean being momentarily stunned or puzzled, as if one has taken two steps back from a surprise or shock.

The idiom "run out" means to use up all of something, usually resources or supplies, until there is none left. It can also mean to use up one's patience, energy, or resources to the point of exhaustion.

The idiom "class clown" refers to someone who is always the center of attention, often due to their humor, but also because they are perceived as outgoing and friendly. They often have a talent for making people laugh and can brighten up a dull class.