to study for a test, usually the night before, in a short period of time - implies that one has not studied the material earlier and must try to condense it into a short period of time
To press, force, or drive, particularly in filling, or in thrusting one thing into another; to stuff; to crowd; to fill to superfluity; as, to cram anything into a basket; to cram a room with people.
In J. R. R. Tolkien's legendarium, cram is a fictional biscuit-like food made by the Men of Esgaroth and Dale, which they shared with the Dwarves of the Lonely Mountain.
Cram was a game show television program that aired on GSN for most of 2003. The show featured pairs of contestants who answered questions while trying to stay awake. Graham Elwood was the host and Berglind Icey (referred to simply as "Icey" on the show) was the co-host.
A password-based authentication mechanism using a cryptographic hash function (usually MD5). It does not provide adequate protection against several common threats to password-based authentication systems. HTTP Digest Authentication is a somewhat better alternative that is replacing CRAM in most places.