There's been a lot of buzz about "witch house" in the past year or two. Integral to witch house is the juxtaposition of creepy gossamer ambience with derelict lo-fi drum-machine. The beat, straight out of Houston, is technically "chopped and screwed." This remixing style was popularized by DJ Screw during the 1990's sizzurp fad, as its languid stutter apparently complemented the codeine-based purple drink. Contrasting the rough trap-hop with eerie gothic aesthetics is dark, spun-out, and often hauntingly beautiful. It got its name because of a supposed link to occults and voodoo and stuff, but it's really more about the sound. There is also the trend of weird typography: spelling words creatively/wrong, using symbols rather than letters, etc. Ostensibly, this is about being difficult to Google and staying underground. More likely is that it's just stylistic.