LAST EDITED ON Jan-18-17 AT 09:01 AM (EST)
Из тебя танцор ужасный.
Iz tebya tantsor uzhasnyy.Ты отвратительно танцуешь.
Ty otvratitel'no tantsuyesh'.
I think second one is the one you need. Because one can... twist first one into meaning "terrific", but second could not be. Mind, it needs correct intonations - or correct delusions. I need to think on that.