Haha, it's seems like only GenZ, young people use these.

Anyway, thank you for explain it.

XD

I learned from YouTube, seeing Kai and AMP.

So native speakers don't say these ones? I saw some videos, many people say:

gyat - rizz - Fanum Tax - huzz - etc.

I don't want to get into da hood, but a lot of people say like this.

This is african american vernacular english (known as AAVE), a dialect of English spoken by black Americans (typically American Descendants of Slavery). It's definitely not a Gen Z thing, though it's been co-opted as such. I would suggest reading up on the history of this dialect and how it's been misunderstood. I wouldn't advise you to speak like this as it may rub some people the wrong way (it might come across as mocking) but it's good to expose yourself to different cultures and dialects.

Some words are just slang (such as the ones you listed out) but still very much Black American. I guess with what words to use and such you would have to have some discernment, exposing yourself more can help you understand. But take this with a grain of salt since I am not a black american haha

Oh I almost try to say some to foreigners.

Seems like if I said that, they would beat the s** out of me.

Thank you for let me know :D