wickedest

/W IH1 K AH0 D AH0 S T/
adjective
  1. 1

    Evil or mischievous by nature.

  2. 2

    Excellent; awesome; masterful.

    โ€œThat was a wicked guitar solo, bro!โ€

Source: https://en.wiktionary.org/wiki/wicked, https://en.wiktionary.org/wiki/wickedest