Low-key annoyed:
* "Hmph" - A short, sharp exhalation.
* "Mrow" - A short, clipped meow with a slightly aggressive tone.
More serious annoyance:
* "Grrr" - A low growl, sometimes accompanied by hissing.
* "Hiss" - A sharp, loud expulsion of air, sometimes accompanied by teeth bared.
Full-blown fury:
* "Meowwwww!" - A long, loud meow with a menacing tone.
* "Yowl" - A high-pitched, piercing scream.
* "Screaming" - A series of loud, shrill meows mixed with growls and hisses.
Onomatopoeia can be very subjective, so don't be afraid to experiment and use your imagination!
For example, you could describe the sound as a "screeching, metallic hiss" or "a deep, guttural rumble that vibrated the floor."
Ultimately, the best way to write the sound of a pissed cat is to consider the context of the situation and choose words that best convey the cat's emotions.