I'm not much of a wrestling fan, but I often hear about a RKO.
I know KO (Knock Out) and TKO (Technical Knock Out, where it's not a KO in itself, but the fight is considered one).
What is an RKO?
Sports Stack Exchange is a question and answer site for participants in team and individual sport activities. It only takes a minute to sign up.Sign up to join this community
This was popularized in pop culture through Vines known as "RKO Outta Nowhere."