| Abbreviation | Definition |
|---|---|
| AIDS | Anally Injected Death Sentence |
| AIDS | Another Illegal Disease Spotted |
| AIDS | As If Doing Something |
| AIDS | Autism Is Deadly Son |
| AIESEC | Anyone Interested Experiencing Something Extra Cool |
| AIG | All Investments Gone |
| AIL | Avian Insect Liquidator |
| AIM | Am I Mad |
| AIM | Ambition In Mind |
| AIM | Aussie Instant Messenger |
| AIMS | Assyrian Information Management System |
| AIOS | Amazingly Intelligent Operative Soul |
| AIPAC | American Initiative Protecting Anti-Christians |
| AISHWARYA | An Intelligent Sarcastic Healthy Wonderful Active Really Youthful Affordable |
| AIT | Ants In Training |
| AIT | Apathetic Incompetent Troglodytes |
| AJ | Amanda Jackoff |
| AJ | American Joke |
| AJ | Apple Jews |
| AJA | Advanced Juggling Articles |