What is it called when somebody swears too much?

When someone swears excessively, it is often referred to as "profanity" or "cursing." In more informal terms, it can be described as "foul language" or "excessive swearing." Some might also use the term "gutter language" to indicate a particular level of vulgarity in their speech. In psychology, excessive swearing can sometimes be linked to stress, frustration, or a lack of vocabulary.