to pack or jam (a container) tight

She crammed her suitcase with clothes

(+ in/into) to thrust (something) forcefully into something

He crammed the notes into his wallet

informal to prepare (a student) hastily for an examination

cram foreigners for English-proficiency exams

informal to eat (something) voraciously; to bolt (one's food)

to study hastily and intensively for an examination

informal to eat greedily or until uncomfortably full