One nighters, also known as one night stands, flings, casual hookups or brief encounters, describe a short-term sexual relationship between two people. Other synonyms for this term include quickie, overnighter and tryst. These words suggest an agreement between the parties involved to engage in sexual activity for a limited period of time without any emotional commitment. Although these terms may have different connotations, all refer to an act of sexual intimacy without any long-term attachment. It's important to note that consensual and safe sex is always the priority, regardless of the term used to describe it.