To get knocked out in a devastating fashion, which makes you seemingly disappear off the face of the Earth in embarrassment; before the knockout you were cocky, disrespectful, and you thought your were invincible.
The act in when you get kicked in the lower jaw, resulting in you getting KO'd by your opponent. A side effect may include a look of disarray in the face.
Dude 1: Hey, man... watch your kicks!
Dude 2: Sorry, Bro.
Dude 1: Yeah, man. I'm not trying to get Ronda Rousey'd
When you find yourself so aroused that your ejaculate (cum) shoots out your penis at such a high velocity that when it hit you you are rendered unconscious.