| Abbreviation | Definition |
|---|---|
| ISFS | Institute for Sustainable Food Systems |
| ISP | Iron Sulfur Protein |
| IST | Imperial Stout Trooper |
| IT | Iced Tea |
| IU | Individual Unit |
| IW | Ice Water |
| IWE | International Wine Exhibition |
| J | Jellybeans |
| JA | Just Awful |
| JAG | Just Add Girls |
| JAM | Jelly And Marmalade |
| JAMO | Jameson Irish Whiskey |
| JAWS | Just Add Water and Serve |
| JB | Japanese Bagel |
| JB | Jaw Breaker |
| JBC | Junior Bacon Cheeseburger |
| JBCO | Jamaican Black Castor Oil |
| JBF | James Beard Foundation |
| JC | Just Corn |
| JER | Big Jer sandwich |