I've never heard it called "liquid diarrhea" before, but good god, that's perfect.
I briefly sold TVs before I moved to Los Angeles, and one of the other salesmen loved motion smoothing. He'd show it off to potential buyers, praising how 'good' it made movies look. All I saw was artifacting. Artficating everywhere. Motion smoothing, higher refresh rates, smart TVs, and 3D were all gimmicks to try and sell you a new TV.