a rybergg
A person who hates kids and loves to yell at them. They usually have no idea what they're doing and make a lot of noise.
My principal is a rybergg. He screamed at me for wearing socks with sandals.
My mom's friend is a rybergg. She yelled at my brother for eating cake for breakfast.
My gym teacher is a rybergg. He shot blanks at me during gym class.