Jekyll

Derived from Robert Louis Stevenson's popular novella, "The Strange Case of Dr. Jekyll and Mr. Hyde"

Dr. Jekyll is a respected doctor and friend of both Lanyon, a fellow physician, and Utterson, a lawyer. Jekyll is a seemingly prosperous man, well established in the community, and known for his decency and charitable works. Since his youth, however, he has secretly engaged in unspecified dissolute and corrupt behavior. Jekyll finds this dark side a burden and undertakes experiments intended to separate his good and evil selves from one another. Through these experiments, he brings Mr. Hyde into being, finding a way to transform himself in such a way that he fully becomes his darker half.

Cockney Rhyming- Jekyll and Hyde = Snide

The Dr in Dr Jekyll and Mr hyde orrrr
One of the nicest people you’ll ever meet, if they chose their name they’re probably autistic (or really really really love classic literature, or both). Chances are they’re really tall and have a good taste in music

Crappy

Used to describe someone who's attitude or behaviour tends to swing from positive to negative. It can also be used when someone is having a sudden seemingly unprovoked off-day.

Jekyll & Hyde was a Broadway musical in the late 90's written and composed by Leslie Bricusse and Frank Wildhorn. It's based (if rather loosely) on the novel "The Strange Case of Dr. Jekyll and Mr. Hyde" by Robert Louis Stevenson. The musical enjoyed a decent Broadway run and was a rather good show.
Unfortunatly, towards the end of its run David Hasselhoff was cast in the role of Jekyll/Hyde. He completely massacred the music and sadly his pitful performace has been captured on DVD for all eternity. Fans of the show or "Jekkies" often harbor an intense hatred for Hasselhoff because of the stigma he set for the show.
Jekyll & Hyde has several memorable songs including "This is the Moment", "A New Life", "In His Eyes" and "Bring on the Men" (which was not actually featured in the Broadway version").
The show has a number of devoted fans (Jekkies) and can still be seen all over the world. Recently, it has been annouced that "Jekyll & Hyde" will soon be made into a major motion picture. It is scheduled to come out in 2007 however, the cast is still unknown at the moment. The film is bound to be successful and will most likely result in a surge of the fan base, much like in the case of "The Phantom of the Opera" (perhaps the most extrodinary musical/story ever (I myself have been a proud "phan" for 9 years)). Many fans eagerly await the film's opening and are completely baffled as to who will be in the cast (hopefully not David Hasselhoff).

One of the best Broadway "Grusicals" ever, telling the story of a doctor and his struggle between himself (Henry Jekyll) and his evil alter-ego (Edward Hyde). Music by Frank Wildhorn and Lyrics by Leslie Bricusse.