COS is the abbreviation of English cost, the verb is COS, and people who play COS are generally called COSER. Generally speaking, the earliest Chinese translation of COSPLAY came from Taiwan Province Province, which means role-playing. But because this translation is the same as the role-playing game (RPG) in the game, in order to avoid the similarity, the author prefers another translation-dressing up. As far as today's COSPLAY is concerned, its form and content generally refer to the use of clothing, trinkets, props and makeup to play ACG (animation, comics, games) or some roles in Japanese Vision Rock and movies. Thus, COSPLAY contains a vast space for its positioning. It can even be said that as long as there is COSPLAYER, this field is definitely the mainstream of teen pop culture today.

The specific content is in Baidu Encyclopedia ~

In addition, cos is also a mathematical function, which refers to the cosine in a triangle, that is, the ratio of the side to the hypotenuse.

Homosexuality:

Meaning in English: ① gay (noun), gay (adjective), especially gay (gay color); 3 cheerful and happy; In fact, there is another dissolute meaning extended from the third explanation; For example, gay friends refers to a dissolute and improper friend; 4 happy. Like a foreign children's song, the lyrics are "we are gay, we are gay." But now the happiness that HAPPY refers to is very different from happiness, and it refers to unfair and improper happiness.

The word "Gay" has had a sexual meaning since at least19th century (maybe earlier). In Victorian England, both women and men were called "homosexuals" (because they were brightly dressed). So in the end, "gay" became the name of all gay men. In the United States, the term may come from the tramp group: a young tramp, or a "gay cat" or an "intermittent cat", often has to make friends with another older and experienced tramp in order to get a chance to learn and survive. There is sex in this relationship, so "gay cat" means "young gay". Among these earliest "homosexuals", Thomas collingwood is the most famous. He is a chubby musician with a face like an angel. After long-term unemployment, he fell into a difficult life.