The phrase "speed merchant" is a colloquial expression often used to refer to someone who is very fast or quick in their actions or movements. Full definition
Our trio of speed merchants could do the same. (justarsenal.com)
Top ten fastest dribblers in world football, including Manchester United and Arsenal speed merchants as well and surprise runner - up (caughtoffside.com)
But once again I am going to ask why Arsene Wenger is not using the Arsenal and England speed merchant Theo Walcott. (justarsenal.com)