1, the word was first popular in fighting fish. It is said that an anchor said that this word does not exist. Later, many netizens also said this sentence. Everyone thought it was very interesting. Later, a great god directly became a formula, that is, what we often see now is equal to tan90.

2. It is easy to understand that there are many stalks or expression packs in daily life, but this word looks a little higher than other stalks, and expression packs are much higher than ordinary ones. Some netizens even ridiculed that if the math is not good now, even the expression pack can't be understood.