When using aphorisms, please try and Google them.

Cajones has been a slang term for "balls" or "bravery" or "having the guts" for over a hundred years. So not only are you being a pedantic prick, you are also a wrong pedantic prick. If you are going to be a pedantic prick, you should be the one to google if you are even right first. I grew up in a Spanish/ English speaking community, this is the word we used (although we used huevos too, but that literally meant like, your balls; less "having the balls", or having courage to stand up to someone). It should occur to you that you don't have a monopoly over the use of language, so maybe check that.