Banger
Etymology
From British slang, where banger has long meant something forceful (also, separately, a sausage or a beat-up car). Its sense of a hard-hitting track spread through dance and hip-hop music culture, then generalized online in the 2010s to mean any excellent thing.
noun · /BANG-er/
An excellent song, and by extension any excellent thing — a post, a meal, a take.
What it names
It names the thing that lands hard and immediately, that hits without needing to grow on you. Extended beyond music, it certifies any standout as an unqualified success — the reliable crowd-pleaser you’d put on repeat.
Example
That closing paragraph is an absolute banger — lead with it.
Related idea
Punchier than a hit: a hit is measured by popularity, while a banger is judged on immediate impact, chart or no chart.