- From several Warhammer 40,000 novels. A Grox is a large, cow-like creature; "You Grox-raping idiot" [ edit ] H Hab SoSlI' Quch! - from Klingon "Your Mother has a smooth forehead." Worst curse/insult in Klingon language. Hangdown - from The Gamblers Fortune by Juliett Mckenns, it refers to the genitalia.