The act of dry-humping a girl with your right knee, while simultaneously dry-humping a second girl with your left knee. There are many ways in which this can be accomplished, including underwater.
"I'm pretty sure Tabb will never walk again, he blew out both his knees trying to nebulizeHillary Duff and that Hannah Montana chick"
By Allianora
Nebulous
A superior or cool person; assuming higher status than the doobuli. People in control, respected greatly by peers and looked up to jealously by doobs.