R
| "Rag out" | To dress well |
| "Red Badge of Courage" | Wounded |
| "Riding a Dutch gal" | To consort with a prostitute |
| "Rio" | Coffee |
| "Roast beef" | Noon meal |
| "Rocks" | Money |
| "Robber's row" | An area in Port Royal, South Carolina, where Southern soldier's went to an area owned by Sutlers, where troops would spend their pay on merchandise and get "robbed" |