| Acronym | Definition |
|---|
| RFB | Receita Federal do Brasil (Portuguese: Internal Revenue Service of Brazil) |
| RFB | Recording for the Blind (since 1995, Recording for the Blind & Dyslexic, RFB&D) |
| RFB | Request For Bid |
| RFB | Ready for Business |
| RFB | Rush for Berlin (gaming) |
| RFB | Republican Flute Band (Ireland and UK) |
| RFB | Recycle(d) Fluidized-Bed |
| RFB | Ring-Fenced Bank (banking) |
| RFB | República Federativa do Brasil (Federal Republic of Brazil) |
| RFB | Remote Frame Buffer |
| RFB | Red Flour Beetle (insect) |
| RFB | Rural Fire Brigade (Queensland & New South Wales, Australia) |
| RFB | Room, Food and Beverage (casinos) |
| RFB | Rectal Foreign Body |
| RFB | Regional Fishery Bodies |
| RFB | Remember Fallen Brothers |
| RFB | Rifle Forward Ejection Bullpup (Kel-Tec) |
| RFB | Rückstellung für Beitragsrückerstattungen (German: Provision for Premium Refunds; insurance industry) |
| RFB | Reportable Fringe Benefit (taxes) |
| RFB | Right Fullback (soccer) |
| RFB | Retained Foreign Body |
| RFB | Rockfeedback (music website) |
| RFB | Really Freaking Big |
| RFB | Repair First Bug |
| RFB | Rollerfootball (Paris, France) |
| RFB | Rebel Flag Bikini (Confederate emblem) |
| RFB | Rise from Below (construction) |
| RFB | Reno France Bâtiment (French: Reno France Building) |