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a thing, person, or event that messes up your day so bad you want to scream and throw your breakfast at them.
My alarm clock was a habachoobie. I woke up to it at 6 AM. I wanted to punch it.
My mom showed up at my party. She was a habachoobie. I had to leave early.
My math test was a habachoobie. I failed it. My brain exploded.