knock cold
knock out
kayo

Following a number of exchanges, the tiger was knocked cold.

I saw something you didn't because you were knocked cold.

But he knew it couldn't be Grace, unless she'd been knocked cold and just this second come to.

Having seen one guy get knocked cold, it would be hard to realize you couldn't do damage.

This being knocked cold and motionless was perhaps the best thing that could have happened to me.

The only reason she didn't come back at the same time you did is that she got knocked cold.

But during his performance he was knocked cold by a kicking horse and ended up in a hospital.

And by God, there were times she deserved to be knocked cold.

The fellow had obviously been knocked cold from the impact of his head against the stage.

On the 15th, he fought a main event at the Garden, and got knocked cold.