Which term refers to a petty misdeed?

The term that specifically refers to a petty misdeed is "pecadillo." This word originates from the Spanish term "pecadillo," which means a minor sin or fault. It conveys the idea of a small, often forgivable mistake or wrongdoing, emphasizing the minor nature of the misdeed in comparison to more serious offenses.

In contrast, "transgression" generally refers to any violation or breach of a law, rule, or moral code, without the same connotation of it being petty. "Infraction" is often used in legal contexts and indicates a violation of rules or regulations, usually of a more formal nature. "Deviation" refers to the act of departing from an established norm or standard, and while it may imply wrongdoing, it does not specifically capture the nuance of a minor misdeed. Therefore, "pecadillo" is the appropriate choice for indicating a petty misdeed.