crammer

/K R AE1 M ER0/
noun
  1. 1

    One who crams or stuffs.

  2. 2

    A book used for accelerated study in preparation for an examination.

  3. 3

    A student who studies hard for an examination.

  4. 4

    A teacher who aids such a student.

  5. 5

    A school whose speciality is helping students to pass certain examinations.

  6. 6

    (British slang) A liar.

  7. 7

    (British slang) A lie.

Source: https://en.wiktionary.org/wiki/crammer