This chapter explores how humour mediates grief on TikTok, emphasising the platform’s role in shaping both emotional expression and content circulation. Moving beyond individual meaning-making, it examines how TikTok’s sociotechnical architectures—remixable audio templates, interactive features, and algorithmic recommendation systems—structure humorous engagements with death. Drawing on Sara Ahmed’s concept of affective economies, the chapter shows how emotions circulate, stick, and are modulated across users, content, and algorithms, producing both inclusion and exclusion in digital mourning spaces. It also highlights the platform-specificity of humour: content that resonates on TikTok may be misread or rejected elsewhere, revealing the contextual boundaries of digital emotional practices. By foregrounding remixability, interactivity, and algorithmicity, this chapter conceptualises death humour as a socio-platformed phenomenon, demonstrating how grief, humour, and technology co-construct one another in contemporary digital culture.