BYF
| Acronym | Definition |
|---|---|
| BYF | Boyne Falls (Amtrak station code; Boyne Falls, MI) |
| BYF | Before You Follow |
| BYF | Burn Your Fuel (blog) |
| BYF | Build Your Future (various locations) |
| BYF | Boyfriend |
| BYF | Be Young Forever |
| BYF | Boston Youth Fund (Boston, MA) |
| BYF | Baptist Youth Fellowship |
| BYF | Backyard Football |
| BYF | Bring Your Friends |
| BYF | Bangladeshi Youth Forum (UK) |
| BYF | Bring Your Font (chat rooms) |