killerly

English

Etymology

From killer +‎ -ly.

Adjective

killerly (comparative more killerly, superlative most killerly)

1. (colloquial) Excellently.
   • 2011, Kelly McClymer, She's a Witch Girl‎^[1]:

     After I'd outlined seven action steps to winning Nationals (practice like mortals, write a killer routine, fund-raise the application fee, get Coach Gertie to send in the forms, create team unity, get entire team focused on winning, perform a killerly perfect routine to wow the judges), I really got into the swing of the ugliest talking todo list.