msfw
Abbreviation for "maybe safe for work." Generally something that's fairly dark and/or suggestive but not overtly pornographic or gorey so therefore not definitively nsfw
Some dude: Wow hey check out this picture of Judy Jetson in her space bikini. What a great drawing. I should totally share this. Hmm. There's no parts showing or anything but her expression has kinna got bedroom eyes a little and her pose is a bit... hmm... When I share it on social media I guess I'll go ahead and mark it #MSFW
msfw
stands for monkey safe for work.
Bob posted some msfw gifs on the work channel. They were funny.