When a particularly sick burn is wrought, a
hype-
man (or woman) may exclaim "That's straight up rancid" to indicate their assent as to the magnitude of the damage. Etymology derives from the process of
meat putrefaction. Word typically employed by dashing young rogues
Bob (to impending burn victim):
Dude you look like the
kid from Home Alone grew up and became a hobbit
Neutral third
party (awed): Damn man - that's straight up RANCID