smutty

Yellow refers to the smutty type, and grey or black to spam messages, many of which offer products or services of various shades of legality.

黄段子是指那些含有内容淫秽的短信，灰段子和黑段子是指那些提供法律灰色地带产品和服务的垃圾信息。

Yellow refers to the smutty type, and grey or black to spam messages, many of which offer products or services of various shades of legality.

黄色指涉及淫秽内容的短信，而灰色或黑色则是指涉及提供非法服务或产品的垃圾短信。