Last night Dave welcomed the creators of South Park as they promote their Broadway Show The Book of Mormon that eventually turned into the constant use of "Sheening" as a reference for drug use.
Because Dave likes to stay topical he brought out a picture of the cross-dressing dynamic duo from the Oscars from way back in the year 2000. It's a conversation they've had many times over the past 10 years, but I think this was the first time they referred to tripping really hard on acid as "Sheening." Looks like the Urban Dictionary just got a new entry.
[There was a video here]