A character development phase defined by rapid transformation — the period in someone's story (real or fictional) when they go from slow to fast, hesitant to decisive, or invisible to impossible to ignore. The flash arc is the montage phase: things are changing quickly, skills are compounding, and by the end of it the person is almost unrecognizable from who they were at the start. Online it's used to celebrate or narrate a personal glow-up that happened with unusual speed.
She went from intern to team lead in eight months — that's a full flash arc.
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Viral internet speak — memes, ratios, main-character moments, and the algospeak of every platform from Twitter to Reddit to TikTok comment sections.
See all Internet & Memes slang on Slangora.