I couldn't stop laughing after you fell on the ice!
Yeah, that was actually NF. I really hurt myself.
|SFF||So freaking funny|
|FAF||Funny as f***|
|FAH||Funny as heck|
|NOIRL||No one is really laughing|
|Spoopy||Spooky and funny|
|HHSF||Ha-ha, so funny|
|WUF||Wow, you're funny|
Someone who thinks something is "not funny" may use the acronym NF to say so. NF is most commonly used in response to a joke or "humorous" observation that was not actually funny (or at least, not funny to your intended audience).
For example, if you tell a gamer that Half-Life 3 has a release date, and then you confess that you were JK, the gamer may respond with NF. If you receive a lot of text or chat messages that contain NF, you may want to consider adjusting your sense of humor.