To get stoned or high as fuck. Or to act in a manor that some might describe as down syndrome or kilt.
All of the realboys got rooned after they smoked weed.
by RealBoyCoppock August 21, 2011
To intentionally wreck, break, destroy or ruin.
The thread was rooned by some assmeg at FFtoday
by DaBeerz April 01, 2003