Mkoll from the "Gaunt's Ghosts" series written by Dan Abnett (I love this series!)

This is Mkoll from the Tanith First (and only) he is one bad mother hummer! In the middle of a warp storm, up to his ankles in mud armed with just his knife injured and facing impossible odds the only thing he has to say to the enemy is "Feth you! Tanith First and only!"

Scene from "Ghost maker"
(yeah I know he's a human :P )