No, they don't.
Have you ever been to Mexico? Some places there are nice but on the whole, it's a very depressing and dismal place to be. I can't imagine living there for more than a day or two at most, and nowhere but a hotel in that circumstance.
I have been to "the streets" several times, though, and know a fair bit about the goings-on of the major players there - even joined one of the local gangs (just for show, I didn't want any cuts or anything, it was purely symbolic) - and I have never once heard the term "Mexican handshake" used. Maybe you're just familiar with a more run-down or worse neighborhood than I am, but I'm pretty confident of my knowledge in these things (I tend to have more casual knowledge than most people just as a result of my relatively wide range of places I've traveled to and the cultures I've experienced)
So yeah, I think all of us would appreciate if, both for accuracy and for integrity, you didn't just try to make up slang words to sound cool for people on the internet, and only speak from the experience you actually have, as I try to do. Other than that, I hope you have a great day, and hope that no one asks your opinion on a subject in which you lack expertise, for I fear that there will be a situation later where your insufficiently truthful information will likely malign their ability to know as much accurate information as possible, and may therefore worsen decision making.
Edit: I seem to be getting brigaded by several hundred alt accounts of u/Johnnadawearsglasses simply because I called him out for his lack of real world knowledge. Instead of actually learning, he chooses to hide my actual experience and factual information. To everyone: please stop downshaking me. It only serves to silence me further, hiding valuable information about the state of cultural life in Mexico, and allowing misinformation to be spread. This is antithetical to all principles I hold sacred, and it must cease immediately. Thank you.
