I thought of {qajunpaQ} “courage, audacity “ too, but this seems to be a form or recklessness in battle, perhaps of the sort that usually gets one killed. "You speak of courage. Obviously you do not know the difference between courage and foolhardiness." (Kor, TOS "Errand of Mercy")
And AFAIK we have one example:
SomrawDu'Daj teb qajunpaQ
His muscles filled with rage (PB)
What mayqel is looking for is the Klingon equivalent of *chutzpah*.