1The fourth in a series of lists, especially lists ranked in order of preference or significance.
2Any (notional) list comprising only the least celebrated or important members of a particular group, especially in the entertainment industry or the media.
Of or belonging to a D-list; specifically designating or relating to a (notional) roster of the least celebrated or important individuals, especially in the entertainment industry or the media. Usually attributive.
1950s; earliest use found in White Book Aggressive Activities towards Yugoslavia. From D + list, after A-list, B-list, C-list.