When hip was hip

Hip may not be so hip. The word was first used in 1904. Other word birthdays Lit Kit finds particularly appropos:
pissed off (1943), snafu (1941), Big Brother (1949), ceasefire (1918), lumpenproletariat (1924) , realpolitik (1908).

For the whole bagel (1932), see http://news.bbc.co.uk/2/hi/uk_news/magazine/3755482.stm