Agatha Trunchbull, also known as Miss Trunchbull or simply The Trunchbull, the fictional headmistress of Crunchem Hall Primary School, is the main antagonist in Roald Dahl’s 1988 novel Matilda, in the 1996 film Matilda and the 2011 musical Matilda.
There are roughly one-sh*t billion tropes so PLEASE look through them before adding one. Otherwise add what you like. ADDITION: PLEASE read through the trope description provided before submitting something. It's not a huge deal but too often people submit characters that don't fit just because they misinterpreted the title...