An intense period of study, sometimes all night before a critical exam.

plural of cram school

(education) A specialized school that trains students to meet particular goals, most commonly to pass the entrance examinations of high schools or universities.

Completely filled; crammed full.

plural of cram session

A painful contraction of a muscle which cannot be controlled. / That which confines or contracts. / A clamp for carpentry or masonry.

(intransitive) (of a muscle) To contract painfully and uncontrollably. / (transitive) To affect with cramps or spasms. / (transitive, figuratively) To prohibit movement or expression of.

(archaic) cramped; narrow

(uncountable) A guessing game in which players guess words that rhyme with a clue word, seeking a word that is kept secret or concealed. / (countable) A word rhyming with another word.

(idiomatic, informal) To restrict someone's free action or expression.