This is slang from the Vospeg region meaning something like "one who is full of self-doubt or who is insecure" and is a word used only as an insult. In the Vospeg region, on the other hand, to call someone a ghaw' is often the prelude to a fight to the death.

KGT p. 30. Throughout the Empire, a soup whose main component is igvah liver has a special name, ghaw'.