Despite knowing karate, Brian usually lacks the will to stop people from punching Steve.

Mr. Junta told the police that he "didn't know if the guy knew karate, he couldn't been a black belt."

I doubt, for instance, if he knows much karate.

Everybody in town knows you know karate.

W/hittaker said he went there with a "fat Hawaiian guy who knew karate."

She decides to try to battle him, but Violator explains that he knows karate as his main fighting skill.

"Don't mess with this guy, he knows karate."

If you're some kind of crazy, watch out, I know karate.

She knows karate and claims to drive like a man.

It made Liz wish she knew karate.