Hello Tyker! It depends on what you are saying. If the eyebrows are that shape naturally then I would call them "drooping eyebrows" or "downward slanting eyebrows". If you are talking about the eyebrows being that shape because of the person scrunching up their face (because of emotion) then I would say "frowning eyebrows". To "frown" means to scrunch up the top part of your face because of anger, sadness or just because the person concentrating. I hope that helps!

like being sad? His brows dropped to the sides.. and his eyes filled up with tears. Struggling to hold back the emotions that were about to break through the dam of his broken heart, he choked, "Why... Why did you do this to me?"

Frown or frowning.