Sentence epithets (когда эпитетом служит целое выражение или предложение, написанное через чёрточку)
Examples
1) And when, as the weeks went by, we gradually discovered that we were both in love with the same deceased woman, it was no help at all. In fact, a ghastly little after-you-Alphonse relationship grew out of the discovery.
2) As roommates, Bobby and I were neither more nor less compatible than would be, say, an exceptionally live-and-let-live Harvard senior, and an exceptionally unpleasant Cambridge newsboy.
J.D. Salinger. De Daumier-Smith’s Blue Period