Irascible
easily angered; irritable
p.o.s: adjective
Synonyms: uptight, angry, grouchy
Antonyms: happy, pleasant, cheerful
Sentences:
1. When people get on my nerves I'm irascible.
2. I am very irascible when i don't get what i want.
Pitch Perfect - Beca's unexpected addition of Bulletproof (Request #1)