Stiffing is a term that is typically used to describe the act of not paying someone the full amount that is owed to them. This type of behavior is often seen as dishonest, unfair and unprofessional. There are several synonyms for the word stiffing that can be used to describe this type of behavior. Some of the most common synonyms include: cheating, shortchanging, tricking, swindling, and defrauding. Regardless of the term used, the act of stiffing someone is never acceptable and can lead to serious consequences. If you are ever on the receiving end of this type of behavior, it is important to take swift action to protect your rights and interests.