The specific name adopted by Jim Henson for his puppets (Sesame Street, The Muppet Show). Muppets frequently incorporate mouth-puppet construction, or are large costume puppets worn by the puppeteers. Foam-rubber construction is used extensively.
The term "Muppet" (capitalized), coined in 1954 by Jim Henson for his puppet act, has unofficially become a slang term (lowercase) with different meanings in various regions. The term is currently owned by the Walt Disney Company's subsidary, Muppets Holding Company.