This slang "Not Coming Slow" has a lot of synonyms. Some of them are

 - Hasten

- Accelerate

- Expedite

- Urge Forward

- Bolster

- Endorse

- Adroitly
- Ably
- Agilely
- Alertly
- Artfully
- Astutely
- Capably
- Cleverly
- Competently
- Diligently
- Effectively
- Efficiently
- Expertly
- Flawlessly
- Intelligently
- Judiciously
- Knowledgeably
- Masterfully
- Nimblely
- Pragmatically
- Quickly
- Resourcefully
- Skillfully
- Smartly
- Swiftly
- Tactically
- Thoroughly
- Vigorously
- Wisely

Persistence