INFF
| Acronym | Definition |
|---|---|
| INFF | Irish Natural Forestry Foundation (est. 2002; Ireland) |
| INFF | International Nova Fitness Federation (Unlimited Potential Concepts, New Port Richey, FL, USA) |
| INFF | Ingenjörer och Naturvetare för Fred |
| INFF | It Never Freakin' Fails (polite form) |