Arse-licking is a vulgar phrase used to describe someone who flatters another person excessively for their own gain. There are several synonyms for this phrase such as ass-kissing, bootlicking, brown-nosing, fawning, groveling, sycophancy, toadying, and currying favor. These words are often used in a negative context to describe someone who is trying to gain favor from someone in power. Although it is frowned upon, this behavior is unfortunately quite commonplace in many workplaces, especially those with a hierarchical structure. It is important to note that arse-licking is not an admirable trait and is not a healthy way to build relationships or get ahead in one's career.