In '29 -- Betty Boop
In '34 -- Marx Bros. 'Duck Soup'
In '39 -- Benny Goodman's Jazz Group
In '49 -- Chevrolet Hardtop Coupe
In '59 -- the Hula Hoop
In '69 -- Joplin, Hendrix, and Woodstock's musical groups
In '79 -- psychological encounter groups
In '89 -- Jordan, Magic & Larry, and NBA hoops
In '99 -- Chicago's Loop
In 2009 -- tea party splinter groups
In two-oh-one-nine -- Will it be Poetry soup?