IPA: /ˈkræmər/
KK: /ˈkræmər/
A person who studies intensively in a short period of time, often just before an exam, or a book designed to help with quick learning for tests.
She is a crammer, spending all night studying for her final exams.
Crammer → The word 'crammer' is derived from 'cram' (from Middle English 'crammen', meaning to pack tightly or fill) and the suffix '-er' (meaning a person who). A crammer is a person who fills themselves with information, often in a short period of time, typically for exams.
Think of someone who is 'packing' ('cram') a lot of information into their mind quickly — that's what a crammer does.