When a girl releases dirty videos or photos of you to Facebook or any social media for all your family and friends to see.
(Don't be a horn dog or a fuck boy and this wont happen to you)
Person1- Dude this chick is fucking releasing dirty videos of me on Facebook.
Person2- LOL omg dude, do you know what your getting.
person1- No what am i getting.
Person2- Your getting Knock Knocked , welp you better start finding new friends.
Kick in the knackers, meaning a kick to the testicles of a male. When a boy is kicked in the cock and balls and it hurts like hell, resulting in the boy falling to the ground in pain and rolling around. A kick to balls/knackers is an unfair move.
Jacob and Harry where fighting at school. Harry would have won the fight but Jacob used a kick in the knackers on Harry and Jacob immediately won the fight as Harry couldn’t continue after having his groin attacked so brutally.