| PHB | Players Handbook |
| MM | Monster Manual |
| DMG | Dungeon Masters Guide |
| AC | Armor Class | How easy/hard you are to damage with a hit (armor, reflexes) |
| d2 | Flip a coin |
| d3 | d6 / 2 rounded down |
| dN | a dice with N sides, commonly 4, 6, 8, 10, 12, 20 |
| d100, percentile | Roll and add 2xd10 (often with different labeling i.e. 1 and 10, 2 and 20, etc) |
| PC | Player Controlled |
| NPC | Non Player Controlled |
| BBEG | Big Bad Evil Guy |
| Natural | Number on the dice |
| Total | Number + Any Modifiers |
| DC | Dice Challenge, Difficulty Check |
| TPK | Total Party Kill |
| Crit | Usually a 20 |
| Fumble | Usually a 1 |
| RAW | Rules As Written |
| RAI | Rules As Intended |
| ROC | Rule of Cool |