cheekiest

/CH IY1 K IY0 AH0 S T/
adjective
  1. 1

    Impudent; impertinent; impertinently bold, often in a way that is regarded as endearing or amusing.

  2. 2

    (of swimwear, underwear, etc.) tending to reveal the cheeks of the buttocks.

  3. 3

    (Australian Aboriginal) Poisonous (of animals such as snakes), dangerous, cunning, violent, potent.

  4. 4

    Indulged in.

Source: https://en.wiktionary.org/wiki/cheekiest, https://en.wiktionary.org/wiki/cheeky