IFNB
| Acronym | Definition |
|---|---|
| IFNB | International Federation of Naked Bodybuilding |
| IFNB | Beta-Interferon |
| IFNB | Intermediarios Financieros No Bancarios (Spanish: Non-Bank Financial Intermediaries) |
| IFNB | Instituciones Financieras No Bancarias (Spanish: Non-Bank Financial Institutions; economics) |