The phrase builds on slay, slang rooted in Black and LGBTQ ballroom culture that spread into mainstream pop culture to mean excelling or looking flawless. On TikTok, another day another slay became a recurring caption and audio for daily routines, outfit posts and motivational morning clips, often linked with ate to mean someone absolutely nailed a look. Its short, rhyming structure made it easy to reuse across GRWM videos and meme edits, and it remains popular as a lighthearted confidence boost rather than a boast about a specific event.