Most days I live on less than 500cal a day and don't get "hangry", in my experience only fatties get hangry, they always freak out whenever they can't stuff their face. I can imagine humans (18-24BMI) can get like that though.   "Hangry" is just an excuse for fats to be assholes to everyone.  It's a bullshit concept in my book.  "I'm hungry so I get to treat everyone like shit until I'm fed!"