Definition of Pepsi generation in US English:

Pepsi generation

noun

US
  • The generation of people in their teens and early twenties in the mid to late 1960s, regarded as a demographic group.

Origin

1960s; earliest use found in Jack Kerouac (1922–1969), novelist and poet (real name Jean-Louis Kerouac). With allusion to a 1963–7 Pepsi advertising slogan, ‘Come alive! You're in the Pepsi generation’.