It may be related to the phrase "spitting fire", which means rapping quickly and very well. "Straight fire" is a compound of "straight", meaning very or authentically, and "fire", a metaphor for something being hot or really good.
The Weeknd's song is straight fire! Weekend的新歌最近一直很火。
四、Salty
這個詞也是在遊戲玩家中非常流行的，Being salty is when you are upset over something little，形容一個人輸不起。那為什麼會用鹽來代表呢？這和眼淚有很大的關係，輸不起的人往往玩 輸了會氣到哭，所以salty的新用法就誕生啦～
He was so salty after he died in smash bros. 他輸了大亂斗後就非常生氣。
An informal group of individuals with a common identity and a sense of solidarity. The term is a bit flashy and is more likely to be heard in hip-hop lyrics than in spoken conversation.
You step to me, and my whole squad will come down on you. 你要是踩到我頭上來，支持我的人都會來對付你。
"Can I borrow a dollar, I promise I'll pay you back" "Bye Felicia" "I promise!" "BYE !"
「我可以跟你借1美元嗎？我保證一定會還給你！」 「不行！」 「我發誓！」 「不行，！
八、
大家千萬不要被這張配圖騙了， 在這裡可不是山羊的意思，而是Greatest Of All Time的縮寫，可以理解為「史上最佳」！
Michael Jordan is the G.O.A.T！ Michael Jordan是史上最佳的！
九、ELI5
這個詞看起來好像某個英語考試的等級，不過也不能說它和考試毫無關係。ELI5的真正意思是Explain Like I'm 5，當你想讓別人explain something in the simplest way possible，用這個詞准沒錯！
Hey, Can you ELI5 the Bermuda Triangle. 嘿，你可以用最簡單的方式給我介紹一下百慕達三角嗎？
十、Cd9
可千萬不要隨便和你的外國朋友說這個詞，你會發現他很長時間都不跟你說話了，因為這個詞的意思是code9，意味著：parents are around!
If your parent are around and you don』t want them to see or know what you are texting, or putting on a website like fb, you send cd9 to alert them not to say or put anything that could get you into trouble!
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