Here's how it's used:
* Sharing: "Fw this to [person's name]!" (Meaning: Send this to [person's name].)
* Recommendation: "Fw this song, it's fire!" (Meaning: Check out this song, it's really good.)
It's often used in online messaging and social media, particularly on platforms like Twitter and Instagram.
Let me know if you have any other slang terms you'd like to decipher!