There's a word for it : the explosion of the American language since 1900 / Sol Steinmetz.

The dawn of the twentieth century: 1900-1909 -- The ballroom decade and the Great War: 1910-1919 -- The roaring twenties: 1920-1929 -- The Great Depression: 1930-1939 -- World War II and postwar: 1940-1949 -- Midcentury- the affluent fifties: 1950-1959 -- The turbulent sixties: 1960-1969 -- The me decade: 1970-1979 -- The yuppie generation: 1980-1989 -- The World Wide Web: 1990-1999 -- The third millennium: 2000-2009 -- Conclusion: the new words lists.