D-Spot
A magic spot on a guy's face. Hit it and he goes down like a sack of potatoes. Everyone knows it from that comic where the guy gets knocked out in one punch.
My uncle hit his D-Spot and fell over like a drunk tree.
That kid just landed a punch right on his D-Spot and he went down like a bag of bricks.
I told my friend to hit his D-Spot and he dropped like a dead fish.