4D

adjective4

1. •
   Describes a 3D film experience that is supplemented with synchronized physical effects.
2. •
   Denotes imaging modes with 3D capability that can also record over time.
3. •
   Abbreviation of four-dimensional.
4. •
   (slang) Having a quirky or oddball personality.

   • Being considered 4D is usually when an idol behaves and acts differently or strangely compared to the usual Korean standards. — 2018