Terminology is a centrepiece in knowledge production, because social phenomena have to be named to become ‘tangible’ for investigation and analysis. Yet, terms are never just denominations for something, but go along with connotations and meanings that have to do with their embeddedness in different contexts, their origins and previous usages. Terms thus have a ‘biography’ which also means that they are never ‘neutral’ or ‘objective’, but prefigure the ways in which phenomena are thought about. This is why the reflection about terms and terminologies should lie at the very heart of any academic knowledge production—which, unfortunately, is very often not the case, including Migration Studies. Moreover, knowledge production in Migration Studies often occurs at the intersection between academia, politics and cultural production with their own terminological logics. To analyse the process of ‘coming of age’ of a new term, the chapter looks at post-migration and how it developed from an origin in theatre production into academic discourse and political activism: What makes it so attractive and how does it relate to other terminologies? And what does it tell us about the productivity of regular terminological reflection—also with regard to terms that became canonical in the field?