All relevant inquiries will be added to the main glossary and also included in the appropriate sport category, if applicable.
- Death Spiral
- Diameter
- Disaster
- Disqualification
- Double Jump
- Double Push
- Downhill
- Drafting
- Draw
- Dropping In
- Dry Land Skating
- Dry Land Training
- Duck Walk - aggressive
- Duck Walk - beginners
- Durometer
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