Gamer's Glossary (Slang names for creatures)

I'll add a few more from my favorite Tower:

Gremlins - galley slaves (because they are in shackles)
Golems - plain golems; stone ones - stones, statues; steel ones - scrap metal (no offense, if you apply a speed buff, they are very good warriors)
Master Djinns - genies (in English, "genie," which is quite fitting - they need to know so many spells :) )

And neutrals (there aren't many of them in this topic):

Snipers - sharpshooters
Boars - wild boars
Fabled Dragon - dragonfly (because of its wings)
Rusty Dragon - acid spitter (it spits acid)
Emissaries (from WoG) - missionaries