Emerging methods for studying cultural dynamics allow researchers to investigate cultural change with newfound rigor. One change that has recently attracted the attention of social commentators is "concept creep," the semantic inflation of harm-related concepts such as trauma, bullying, and prejudice. In theory, concept creep is driven distally by several recent cultural and societal trends, but psychology also plays a proximal role in developing and disseminating expansionary concepts of harm. However, there have been few systematic attempts to document concept creep and none to explore factors that influence it. The present work reviews concept creep from the perspective of cultural dynamics and lays out a conceptual framework for exploring processes implicated in it. Illustrative analyses are presented that apply computational linguistic methods to very large text corpora, including a new corpus of psychology article abstracts. They demonstrate that harm has risen steeply in prominence both in psychology and in the wider culture in recent decades, and that harm-related concepts have inflated their meanings over this period. The analyses also provide evidence of dynamic relationships between the prominence and semantic breadth of harm-related concepts, and between psychology and the culture at large. Implications are drawn for theory and research on concept creep. (PsycInfo Database Record (c) 2021 APA, all rights reserved).