The never mentioned B. (Black Flame) could be a theme nobody talks about but evrybody maybe know or at least heard about, so some bad curses are maybe: "By the Fall of Kadaikos" similar to "What the hell...?" but still shocking because people are more feared by this evil god/religion than dakkru. And Black Flame is a taboo theme.
And mentioning different monters are also fittin well because there are many in YLiakum.
"gobble brain", "trepor dung" as said, "You child of a Tefu", whatever