Metaphors are elementary particles of meaningfulness, serving as cognitive resources for framing social problems or social movement narratives. This article presents a diachronic analysis of a metaphor synthesizing insights from cultural sociology and conceptual metaphor theory (CMT), an interdisciplinary neuroscientific program with robust empirical findings for how meanings change over time. I track the diffusion of ‘the most ancient’ metaphor for prostitution through publications on both sides of the Atlantic from its coinage by Rudyard Kipling in 1888. I explain the puzzle of its persistent polysemy by its embeddedness in three discursive communities: occupational professionals; social movements demanding state action against white slav...