KGT 49: ... the verb suffix -chu' (perfectly), when used with some verbs of fighting, implies that the fight results in death. From the Klingon point of view, Suvchu' ("fight perfectly") is fight to the death. The archaic Klingon phrase ghIqtal also means "to the death", though it is generally used as a sentence in its own right, a type of exclamation. For example, just before striking the first blow or firing the first shot in a battle, warriors may shout ghIqtal!

st.expertforum (7/1998): ghIqtal means "to the death" in an archaic form of Klingon. It survives as an exclamation, something that you'd probably just shout out (or snarl) at the start of or in the throes of battle or a duel.

KGT 30f.: throughout the Empire, a soup whose main component is *igvah* liver has a special name, ghaw'. This word is avoided in the Vospeg region, however, because there, the word ghaw' is a slang term meaning something like "one who is full of self-doubt or who is insecure" and is a word used only as an insult. To refer to the soup, one simply says 'IghvaH chej chatlh (literally, "*igvah* liver soup"). In most of the Empire, to say to someone ghaw' SoH means only "You are *igvah* liver soup", an odd thing to say, but more incongruous than anything else. In the Vospeg region, on the other hand, to call someone a ghaw' is often the prelude to a fight to the death.