Groucho glasses, also known as the beaglepuss, are a humorous noveltydisguise based on the stage makeup that caricature comedian Groucho Marx wore (i.e., large fake mustache, eyebrows, and glasses). They typically consist of black horn-rimmed glasses with attached eyebrows, large plasticnose, bushy moustache, and occasionally with an attached plastic cigar. Considered one of the most iconic and widely used of all novelty items, Groucho glasses were first marketed in the early 1940s and are instantly recognizable to people throughout the world. Groucho glasses today are often used as a shorthand for slapstick.
^Giddins, Gary (2001). The New York Times Book Reviews 2000, volume 1. Fitzroy Dearborn Publishers. ISBN1579580580. "The most enduring mask of the 20th century—likely to take their place alongside Comedy and Tragedy or Pulcinella and Pierrot..."