Prevision

Noun; compound of prefix 'pre' and noun 'revision'.
A form of panicked revision which takes place in the days and hours before an exam. Good old-fashioned revision becomes prevision when the "revisor" comes across a completely unfamiliar topic their teacher has neglected to mention prior to this point. Hence the student is not revising -revisiting- a subject but frantically trying to learn and revise it all at once.

Verb; To Previse.

1.The night before her maths GCSE Bethany was astounded to find that the Factor Theorem was part of the syllabus. As she was unaware such a Theorem even existed she filled twelve sleepless hours with frantic prevision, which culminated in her sending an abusive email to her maths teacher.

2. Martin: Surely you knew the Baddeley and Godden study would be in the exam?
Beth: If I had I would have prevised it, fool!