Chingar is probably the most used verb on Mexican slang. Chingar literally means “to annoy” most all the time, and you can use phrases like “no estes chingando” or “como chingas” to say someone is very annoying, but it can also be used to say something broke, or its broken (Esto se chingo/eso esta chingado) or when you are going to screw someone up in a fistfight. “te voy a chingar” (-Te voy a verguear/madrear/putear- work in the exact same way, with other slang words)
As a substantive, you can modify it and make it into “chingon”, that literally means badass, as well as chingada or chingado, wich means someone has been screwed over.
This has some historical context, because some people refer to Mexicans as “hijos de la chingada” wich literally means, sons of the chingada. This is because the women native to latin America were raped by the Spanish conquerors, so you can say, they were “chingadas” by them.
When you have a lot of things, or when you want to accentuate something, you say “un chingo” or un “chingazo”
Ex. Tengo un chingazo de deudas/ i have lots of debt.
Hace un chingo de calor/Its extremely hot (the weather).
And yes, chingar can also means intercourse, but its mostly used when a man is being a jerk and showing off with their friends about a woman he had fun with, instead of being something romantic.
Chingar is a violent verb most of the time. When you say things like “chinga tu madre” or “chingate”, you are literally throwing Mexican F-bombs. Also, it has a few not so harmful uses, like when you are going to drink or eat a lot in a single sitting, you can say, “me voy a chingar veinte cervezas” “ayer me chingue veinte tacos” (I’m going to drink 20 beers/yesterday I ate 20 tacos)
Anyway, that was the verb chingar, and even if you think is disrespectful or not nice most of the time, its very commonly used and useful to know if you really want to get the most out of your interactions with Mexican people.
I hope you have learned something new, about the spanish that real mexican talk on their everyday life.
If you want to improve your Spanish, I also give tutoring lessons on skype using this page that host many teachers from all over the world, and while I don’t really do grammar, I can help with conversation and doubts about the language. Also, if you are interested in any language besides spanish, there are teachers and tutors for any language there.