Friend: " My girl tripping dawg, she kicked a ni**a out cause she said she saw some shit I did on Facebook, you think you can give me a ride to my sister Rayneshia pad?"
Its origion is mostly unknown, but can be traced to ancient versions of Lord of the Rings, and the sayings of several intelligent people like Dan W and Sam.
Similar to fuck, HYF can be used in literally any form of word. It can be used as a noun, verb or adjective.
Xtreme949: Ur really BTLG
funkymonk1245: HYF!
Xtreme949: What?
funkymonk1245: HYF!
Xtreme949: Go away!
funkymonk1245: HYF! BTLG!