This article will discuss why cursing and swearing, as manifestations of emotional language, should be addressed in foreign language learning (FLL). Psycholinguistic and pragmatic studies have argued that cursing and swearing are a central component of an individual's communicative repertoire, fulfilling a variety of functions, including expressions of surprise, joy, frustration, anger and pain. Sociolinguistic studies not only confirm this but also highlight the taboo nature of these utterances, as well as the complex social and group constraints that dictate their usage. Given the central yet controversial status of cursing and swearing, it is hardly surprising that it is largely ignored in FLL, although strong arguments have been advanced in favour of teaching emotional language, which incorporates swearing. This paper will explore the possibilities for making cursing and swearing part of a foreign language curriculum, particularly for advanced learners, and will assess the role currently played by teaching materials. Given the marginalised function of cursing and swearing, and questions of interlanguage synonymy and equivalences, should the acquisition and understanding of cursing and swearing remain outside formal language learning, or do learners need to be made aware of the possibilities for emotional expression, making appropriate use of vulgar and taboo registers?