Antoymn for slowcoach?

Solution 1:

In Britain, you could probably get away with saying be a "Billy Whizz".

Billy Whizz was a character from the comic "The Beano" and was known as "The World's fastest boy".

You're going to be late for school; come on, Billy Whizz!

Another character from the small screen could be "Speedy Gonzalez".

You're making too many mistakes; slow down, Speedy Gonzalez!

Solution 2:

Hurry up and get ready for school. Don't be a slowcoach! Be ______ !

1. swift as an arrow (very fast)
2. swift as the wind (ditto)
3. faster than greased lightning (extremely fast)
4. faster than a speeding bullet and FTASB (very fast)