Smerdley is Mr. Briteweight's coffee assistant.
In the Muppet Meeting Film "The Big Picture", Smerdley is reluctant to get Mr. Briteweight's cup of coffee, launching Briteweight into a "Sell, Sell, Sell!" type lecture. When acting out that the company has died, and it's Smerdley's fault and tries to jump out his window, Smerdley changes his mind, and runs to get the coffee; through the open window.
Smerdley has appeared as a generic whatnot in many productions.