Means something (usually food) is incredibly good, tasty, or impressive, basically an amped-up way of saying “delicious” or “fire.” While it’s mostly used for food, it can stretch to describe anything genuinely excellent, a song, an outfit, a vibe.
Rooted in African American Vernacular English (AAVE), where “bussin'” comes from “busting,” as in something so good it’s bursting with flavor. It’s been around in Black communities for years but exploded into mainstream slang around 2020-2021 through TikTok food reviews and viral cooking videos, becoming one of the most overused (and most parodied) food-related slang terms online.