Definition of crams:
(v) :
(transitive) To put hastily through an extensive course of memorizing or study, as in preparation for an examination.
(v) :
(transitive) To press, force, or drive, particularly in filling, or in thrusting one thing into another; to stuff; to fill to superfluity.
(v) :
(transitive) To fill with food to satiety; to stuff.
(v) :
(intransitive) To study hard; to swot.
(v) :
(intransitive) To eat greedily, and to satiety; to stuff oneself.
(n) :
The act of cramming (forcing or stuffing something).