On Wed, Jul 19, 2017 at 11:33 AM, mayqel qunenoS <mihkoun@gmail.com> wrote:
qurgh:
I use the general invectives as exclamations and the epithets as nouns or exclamations.

Wouldn't be strange though to use an epithet as an exclamation ? An epithet like {petaQ} {Qovpatlh} {taHqeq} etc, describes a person, right ?

No. "Oy! Dickhead! Get off my lawn!" - {'o! taHqeq! magh yotlh yIlItHa'!}

Epithets can be used as nouns (toDSaH SoH!) or exclamations (toDSaH!!!) when you are calling someone it. 
 
So, how could we use it in a moment of lets say anger or frustration, without referring to a specific person ?

You wouldn't. That's what the general invectives are for. Drop something heavy on your foot? Qu'vatlh! Get some unsettling news? QI'yaH! 

 
Would it make for example sense to say: {QapHa' jonta'. taHqeq !} ?

An English version of this would be something like "The engines don't work. Asshole!" Does that work? I guess if you are calling the {jonta'} a {taHqeq} it works. 

qurgh