The major downfall of a class or classes grade. Usually used as a noun to define a point in time when the event happened.
Luke: My whole chemistry class's grade dropped from those tests.
Pete: Sounds like you're talking about The Reiss Massacre.
The God amongst all teachers. Singlehandedly raises your marks up by 25%. Truly a legend. Oh also has sexy wigs.
Mr. Awad is the chemistry God.