The idiom "have a cow" is an expression used to describe someone who is very upset or angry. It can also be used to refer to someone who is behaving unpredictably or irrationally.

The idiom "give it a whirl" is used to encourage someone to try something new or different for the first time. It implies that there might be some risk involved, but also suggests that the outcome could be positive.

The idiomatic expression "know which side one's bread is buttered" means to know which group or team an individual belongs to, what their allegiances are, or what their interests are.

The idiom "a needle in a haystack" refers to something that is very difficult to find, especially when surrounded by many similar things. It's like looking for a small needle in a large pile of haystacks.

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.