In most usages it's talking about having courage, similar to saying someone has "guts" or "balls"
"I don't think he has the kahones to jump that bridge"
by Reese4.0 February 12, 2006
slang for balls, as in testicles.
He talked back to the judge, that guy has big kahones!
by melamook May 01, 2005
Common misspelling of the word "cojones", which is Spanish for testicles/balls.
He doesn't have the kahones sic to actually do it.
by ejdp July 26, 2008