high-flyer

/HH AY1 F L AY0 ER0/
noun
  1. 1

    A person who or a type of aircraft that flies at high elevations.

  2. 2

    An ambitious person, especially one who takes risks or has an extravagant lifestyle.

  3. 3

    A vertical pole used in commercial fishing to locate the beginning and end of a long fishing line.

Source: https://en.wiktionary.org/wiki/high-flyer, https://en.wiktionary.org/wiki/highflier