Testy

[Sarah]

Fretful; peevish; petulant; easily irritated.Must I observe you must I stand and crouch Under your testy humorShak.I was displeased with myself; I was testy. Latimer.

[Tanya Shivari]

Easily irritated; impatient and somewhat bad-tempered.

[Justin Bieber]

Someone who is easy to set off or have very low amounts of [patience]. You could [say something] meant as a compliment and theyll [flip out] regardless.

[Tina]

easily annoyed and not patient: