Basketball is a popular sport around the world, and many fans choose to express their love for the game through their online username. Here are some cool basketball-inspired English usernames to consider:

1. DunkMaster: This username is perfect for someone who loves to dunk and has mastered the art of it.

2. HoopDreamer: For those who dream of playing basketball and making it big one day.

3. SwishKing: A name for someone who can shoot the ball and make it swish through the hoop every time.

4. Alley-oopAce: A name for someone who loves to throw and catch alley-oop passes.

5. ReboundRanger: A name for a player who excels in grabbing rebounds.

6. CrossoverChamp: A name for someone who has mastered the art of the crossover dribble.

7. SlamDunkSensation: A name for someone who loves to wow the crowd with their slam dunks.

8. NetNinja: A name for someone who can shoot the ball with precision and make it hit nothing but net.

9. CourtConqueror: A name for someone who dominates on the court and conquers their opponents.

10. BallerBoss: A name for someone who is a boss on the court and knows how to take charge.

These are just some examples of basketball-inspired usernames that you can use to show off your love for the game. Choose one that fits your style and personality, and let your passion for basketball shine through.