I'll add some more of our slang to the list:
Ghosts - Babki
Knights of Horror - Dreads
Goblins - Koliany
Lizards - Zaytsy
Basilisks - Vasyuki, Great Basilisks - New Vasyuki
After the demons (I don't even remember the name) - Zhopocheosy
To summon elementals during a battle - to "v...bat govna."
A tedious fight with slow monsters, where you have to wait, attack, and run away - "Disco."
I'll add more as I remember something.
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