Slang word with no connotions for Rock music in the vein of the Symphonic Progressive Rock of the 1970s. Originated on fan-based message boards.
"The band Sleepytime Gorilla Museum's 'Grand Opening and Closing' is a unique experience for Progressive Rock fans who want something to contrast with their vast array of flonkus CDs." From a Review
by DidSprintingDie May 17, 2004