What was the popular term for convicted criminals dumped on colonies by British authority?

They were often simply called convicts.

Or they could be known as Jayle Birds a term used in the 18th century. This was a term restricted to the American colonies.

The term POMs also became popular, but it is a myth that it originated from the acronym "Prisoner of Mother England".
"jayle birds"

(p.90 of The American Pageant)