Sink a Kebby

Sinking a Kebby is to strike with the head, typically involving the use of tougher parts of the skull to connect with softer parts of the recievers head. See Headbutt

If that dude doesn't stop looking at me, I'm going to sink a Kebby on him!

Did you hear about Zinedine Zidane? He sunk a Kebby in the World Cup Final!