If you're in China, you've got a unique opportunity to pick up some of the world's nastiest swear words, profanity and curses, if only you know where to listen for them. No matter where you go, there will always be certain kinds of situations where people are prone to using Chinese profanity and swears almost constantly.
These guys can be your best source if you want to learn to swear in Chinese - especially in traffic. As a general rule, anything that a Chinese taxi driver shouts or mutters after a near-collision (should happen 2 - 3 times per ride in a Chinese city like Beijing) is probably a Chinese curse word. To confirm this, repeat it in an angry tone and watch the cab driver's reaction - if he starts laughing his ass off, it's probably Chinese profanity.
They're all over China, and they're pretty rough guys - wait around the constructions site for a while until you see an industrial accident, then listen to what the victim shouts. If he dropped something on his toe, he's probably screaming a Chinese swear like "F*ck, my toe!" in his local Chinese dialect.
They sit around in alleys, street corners and convenience stores, constantly swearing at each other. Watch a Chinese street corner card game for ten minutes and you should be able to pick up a great set of trash-talking Chinese profanity. In particular, listen to what players say immediately before and after handing over all of their cash - it's probably a Chinese curse.
If it's three o'clock in the morning, and someone's standing outside of your neighbor's apartment, shouting something over and over and smashing on the door, it's probably Chinese swears and curse words. If the person inside is shouting the same thing back, it's almost certainly a nasty one. Take particular note so that one day, you can stand outside someone's apartment at three o'clock in the morning, screaming at them to fuck their mother.
Remember, as a general rule, if someone in China is shouting something repeatedly while pointing fingers, pushing, writhing in pain or immediately after having suffered an ignominious slight, setback, or injury, it's probably Chinese profanity. The thing about Chinese swear words is that the only way you're going to learn to swear in Chinese is by listen to other people curse in Chinese. And for that, you might have to get creative.`