a'pcha
A weird noise you make when you're so confused, annoyed, or turned on you don't know what to say. It's like your mouth is trying to say 10 words at once.
A'pcha! My mom signed me up for a cooking class and I hate vegetables.
A'pcha! My crush asked me out and I tripped on my shoelace.
A'pcha! My brother gave me a haircut and now I look like a raccoon.