A dry cleaning bag that has been tied in knots along its length, hung from the ceiling, and lit on fire. The burning plastic will then drip down into a pan of water, with the drops making a groovy whooshing sound as they fall.
Wow man, we blew a couple joints of Panama Red last night and lit a flaming groovy in the living room. The fire department got there really quick after the couch caught on fire!
1) Smoking marijuana with seeds that erupt, sending a shooting flame.
2) The burn hole left in your clothes when a lit ash of a joint falls onto them.
Wow,dude. You about burned off your nose with that flaming groovy.