Shorthand way of saying casket. The Raekwon/Wu-collective collab song 'Guillotine(Swordz), off of 'Only Built 4 Cuban Linx' contains the following line by Inspektah Deck: 'Poisonous paragraphs, smash ya phonograph
in half, it be the Inspectah Deck on the warpath,1st class leavin mics with a cast' is often misinterpreted as reading 'leaving mics in a cas'. Subsequent to the track's release, the term was popularized amongst the underground, when in fact it didn't exist at the outset. Thus proving hip-hop vernacular's spontaneous generation theory.
Leave in a cas, I'm heavin' your ass, over my shoulder like a newlywed, gonna learn how it feels like to-be-dead