frivolous
1. [ adjective ] not serious in content or attitude or behavior
Examples:

"a frivolous novel" "a frivolous remark" "a frivolous young woman"

Related terms: serious airheaded airheaded flippant idle light trivial flighty superficial seriousness
Similar spelling:   frivolously
  frivol
  frivolity
  Fravel
  frivol_away