Color-treated hair with at least 2" or 3" of contrasting natural hair color "roots" prominently visible - especially blond hair with dark "roots". Typically observed in newspaper photos of individuals, most frequently women, about to go on trial after spending a few months in jail without access to hair color. Also observed in Wal-Mart and grocery store checkout lines.

Adj. Something that is expected to have a long lifespan by virtue of having existed for a long time, based on the lindy effect, named for the New York restaurant Lindy's, coined by Albert Goldman and popularized by Nassim Taleb.