Based on a Tumblr Post — Tag Meaning
A provenance tag crediting a Tumblr post — a text post, AU prompt, or shitpost — as the fic's seed. An entire ecosystem of fic exists translating 'imagine your OTP' posts and viral jokes into full stories, and this tag is its citation format.
What to Expect From "Based on a Tumblr Post" Fics
Expect a premise with meme DNA, often linked in the notes, executed anywhere from crack to surprising sincerity.
How to find Based on a Tumblr Post fics on AO3
On AO3, click any tag to see every work that uses it, then refine with the "Filters" sidebar — combine it with your fandom or ship, set a rating, or exclude tags you don't want. See our AO3 filtering guide for the full walkthrough.
Browse "Based on a Tumblr Post" works on AO3Popular Fics Tagged "Based on a Tumblr Post"
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Related Tags
Tumblr Prompt
A freeform tag for fics written from prompts received or found on Tumblr, where ask-box requests and prompt lists drive a huge share of short-form fanfic. The original prompt is usually quoted in the summary or notes.
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Originally Posted on Tumblr
A canonical tag from AO3's 'originally posted elsewhere' family, marking works first published on Tumblr and later archived properly. Authors migrate their prompt fills and ficlets to AO3 for permanence Tumblr cannot promise.
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Prompt Fill
A canonical tag emphasizing the act of filling a specific request, the vocabulary of kink memes and prompt communities where 'fill' is the technical term for a completed response. It signals the work answers someone's particular ask.
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Crack Treated Seriously
Takes a premise that should be a joke and writes it with complete sincerity — full characterization, real emotional stakes, careful worldbuilding around something ridiculous. The tension between absurd setup and earnest execution produces some of fandom's most surprisingly moving work.
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