Final tteyuu as a mockery stance marker: Multifunctionality and ongoing semantic change in Japanese social media

This paper explores the ongoing semantic change of a discourse marker in Japanese social media. An analysis of 140 instances of the sentence-final tteyuu on Twitter, renamed X in July 2023, suggests that this discourse marker is shifting from a textual function of elaboration to a stance marker of lighthearted mockery. I argue this transition is attributed to its recurrent use in specific contexts, leading to invited inferences about the writer’s intentions in expanding upon an idea, which extend beyond purely informational to interpersonal and social concerns. The functional ambiguity of these examples suggests an intermediate stage in tteyuu’s evolution. The findings of this study underscore the centrality of pragmatic inferencing in semantic changes as well as the context-dependent nature of meaning creation.