Another term for a Bounce-blower, which is a simple device used for masking the smell of marijuana. Essentially, it is a bare toilet-paper roll with a laundry sheet held over one end with an elastic and other laundry sheets stuffed inside. To use, one simply takes a hit (off a joint, pipe, bong, etc.) and then blows the smoke into the end without the sheet over it.
Joe: "Hey man, what happened to the happy-hoot?!"
Elliot: "Oh my God, I sat on it!"
Another name for a Bounce-blower, which is a device used to cover up the scent of marijuana. Essentially, a happy-hoot is a spent toilet-paper roll with a sheet of fabric softener folded over one end (usually held in place with an elastic). It is recommended that the user also stuff a few extra sheets into the shaft of the roll, in order to help dissolve the scent.
Worried that his parents would find out he smoked pot, Alex secretly made a happy-hoot for his enjoyment.