Top definition
1. a teacher, tutor, instructor or anyone who bestows knowledge upon anyone

2. the act of learning something considered difficult, gaining knowledge or wisdom the hard way
1. On the first day of school, my parents sent my siblings and I into the caring tutelage of a new brain bruiser.

2. Learning quantum physics was a real brain bruiser!
by Ruby Slippers February 26, 2010
Get the mug
Get a brain bruiser mug for your dog Jerry.