American slang: literally balls, testicles; figuratively a man who has big kahunas has a lot of nerve, is brave, a risk taker, has a lot of testosterone.
Ted Turner: "Hey, listen. You've got to have big kahunas to be in this business.
Ronald Comacho, one of three fans arrested, filed a lawsuit against the Chicago Cubs. If you're involved in starting the ruckus, you have some pretty big kahunas to then file a lawsuit.
How big are the balls of the person who posted this message? My hat is off to the guy with the "BIG KAHUNAS"!