The phrase "were foulmouthed" can be replaced with several synonyms depending on the context. A few examples include vulgar, profane, obscene, crude, tasteless, and offensive. These words describe someone who uses coarse and offensive language. Other synonyms for "were foulmouthed" could include impolite, disrespectful, abusive, or crass. These words describe a person who is rude, disrespectful, or offensive in their behavior towards others. It is important to choose the appropriate synonym depending on the context in which the word is being used, to ensure that the intended message is clear and effective.