This article needs additional citations for verification. (June 2011) (Learn how and when to remove this template message)
The term lounge lizard is usually used to refer to lounge musicians, most often in a pejorative sense. Since its first appearance as American slang in 1917, "lounge lizard" has shown up in nearly every decade.
In Buster Keaton's 1924 film Sherlock, Jr., Keaton plays a projectionist at a movie theater where the movie showing is "Hearts & Pearls or The Lounge Lizard's Lost Love". The movie within a movie has a character who is good looking and well dressed, who is romantically involved with a wealthy young woman.
A "lounge lizard" is typically depicted as a well-dressed man who frequents the establishments in which the rich gather with the intention of seducing a wealthy woman with his flattery and deceptive charm. The term presumably owes something to the cold and insinuating quality of reptiles.