Speedster (noun)

1. A person who is known for being fast or quick.
2. A person who excels at or enjoys activities that require speed, such as racing or running.

Origin:

From the verb "to speed".

Examples:

1. He was a speedster on the track team, always coming in first.
2. The speedster completed the marathon in under two hours.
3. She was a speedster typist, able to type over 100 words per minute.
4. The speedster was the first one to finish the obstacle course.
5. The speedster is known for breaking records and winning races.