noun
inside story; real story; untold story
Abbreviation of 裏話 (うらばなし). Used in casual conversation or media to refer to the behind-the-scenes or true account of an event, often implying it is not widely known.
See also: 裏話 (うらばなし)
あの事件のウラバナ、知ってる?
Do you know the inside story of that incident?
この本には業界のウラバナがたくさん書いてある。
This book contains many untold stories of the industry.