Fire is slang for meaning that something is impressive, awesome or really good.
The slang term fire is also used to describe fashion, music or performances which are exceptional or exciting.
The slang term fire originated in African American Vernacular English and hip hop culture and the term fire has become a widespread used term, especially among young people.
Fire is a positive term that indicates something is of high quality or exciting or impressive and can be used to describe anything from a song or outfit to a performance or even a meal.