PRONUNCIATION: (ROH-luhr-koh-stuhr)

MEANING: noun: Something marked by sudden and sharp shifts in circumstances.
adjective: Marked by sudden, extreme changes.
verb intr.: To go through extreme and abrupt changes.

ETYMOLOGY: After rollercoaster, a thrill ride that typically travels at a high speed along a path marked by sharp curves and steep inclines. Earliest documented use: 1883, for verb: 1931.

TROLLERCOASTER - someone who deliberately inflames a chatboard and then sits back and watched the unfolding acrimony

ROLLER-CASTER - redundant name for the wheels on as piece of heavy furniture

ROLLER-CHASTER - more effective at avoiding temptation