n.
1. Dental floss.
2. Short or waste silk fibers, especially from the outer surface of the cocoon of a silkworm.
3. Soft, loosely twisted thread, as of silk or cotton, used in embroidery.
4. A downy or silky fibrous substance, such as corn silk or silk cotton.
5. A body feather of an ostrich.
6. A small stream of water.
7. Fluid glass floating on iron in the puddling furnace, produced by the vitrification of oxides and earths which are present.
v. tr.
To clean between (teeth) with dental floss.
Just like when you floss something you just ate out of between your teeth, just like you brush your shoulders off of dirt or what-have-you, "You Just Got Flossed" means that someone just disrespected or dissed you and flossed your ass out their teethlike as if you were that disposable. Like it ain't nothin.