Green’s Dictionary of Slang

horrorshow adj.

[horrorshow n. on bad = good model, but note use in Anthony Burgess, A Clockwork Orange (1962), where it means excellent and is based on Rus. horosho]

(US teen) extremely good.

Online Sl. Dict. 🌐 horrorshow adj 1. very good, excellent; COOL. (‘I thought the movie was horrorshow.’).