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The idiom "fish in troubled waters" is rooted in the world of fishing, where it refers to the practice of fishing in turbulent or disturbed waters. The origin of the phrase lies in the idea that when waters are troubled, fish may become disoriented or agitated, making them easier to catch. Fishermen would take advantage of this situation to increase their chances of catching fish. It is used figuratively to describe someone who seeks opportunities or advantages in situations of confusion, disorder, or difficulty.

The phrase "have one's cake and eat it" is an idiom that is used to express the idea of wanting to have things both ways, which is often impossible. The origin of this phrase can be traced back to the 16th century, and its earlier form was "eat your cake and have it too."

The idiom "know which side one's bread is buttered on" has its origins in the practice of buttering bread. The phrase has been in use for centuries and was used both literally and figuratively. In a literal sense, it referred to the act of spreading butter on one side of a slice of bread to make it more palatable. Figuratively, it is now used to advise someone to recognize their own best interests and make choices that benefit them.

The idiom "not give a sucker an even break" likely originated in American slang during the early 20th century, particularly in the context of confidence tricks and swindles. The term "sucker" was used to refer to a gullible or easily deceived person, often someone who could be easily cheated or taken advantage of. In this context, "an even break" means a fair and equitable opportunity. It is used to describe situations where someone is being taken advantage of or deceived, especially when the person being deceived is vulnerable or unsuspecting

The origin of the idiom "give an inch" can be traced back to the concept of measurement and the use of inches as a unit of length. In this idiom, "inch" symbolizes a small, measurable increment. The phrase likely emerged from the idea that when someone grants or allows even a small concession or compromise, it can create an opportunity for others to exploit or demand more. It is commonly employed in situations involving negotiations, relationships, or interactions where boundaries or limits are set.

The origin of the idiom "want jam on it" is rooted in colloquial English, particularly in British slang. The phrase originated in the early 20th century and is often used as a playful or sarcastic remark to express a desire for something additional or extra when it is not necessary or already sufficient. The phrase can be used in various contexts, such as when discussing food, personal preferences, or even when someone is being overly particular or demanding about a particular matter.