crammer

noun

1. One who crams or stuffs.

   “The pigeon crammers of Paris took mouthfuls of grain and water and spat it into the mouth of a pigeon.”

2. A book used for accelerated study in preparation for an examination.
3. A student who studies hard for an examination.
4. A teacher who aids such a student.
5. A school whose speciality is helping students to pass certain examinations.
6. (British, dated, slang)A liar.

   “Look here; do you mean to call me a crammer?”

7. (British, dated, slang)A lie.

   “I'm afraid he wouldn't mind telling crammers about it if he was questioned.”