A Big Asshole
A Big Asshole is someone who treats you like dirt every day. They are loud, grumpy, and punch you in the gut just because they feel like it.
You ask for help, and they yell, 'I don't need your help, I'm fine!' and walk away.
They rearrange your toolbox just because you missed one bolt.
They tell the boss you're lazy so you get stuck cleaning the break room.