Algernon's imaginary friend, used as an excuse to avoid social obligations, is called Bunbury.
In Oscar Wilde's play "The Importance of Being Earnest," Algernon frequently claims he needs to visit his invalid friend "Bunbury" whenever he wants to escape a social engagement.
Fictional character: Bunbury is not a real person, but rather a fabricated excuse.
"Bunburying": The act of using a made-up reason to avoid responsibilities, often associated with Algernon's behavior.