吓得我赶紧查一下什么是 NSFW：

Look up NSFW in Wiktionary, the free dictionary.
Not safe for work (often shortened to the acronym NSFW) is an Internet slang or shorthand used to mark URLs and hyperlinks which link to videos or websites pages containing nudity, intense sexuality, profanity, violence, and/or other potentially disturbing subject matter, which the viewer may not wish to be seen looking at in a public or formal environment, including a workplace or school. NSFW has particular relevance for people trying to make personal use of the Internet at workplaces or schools which have policies prohibiting access to sexual and graphic subject matter.