Idioms and Phrases with and then some
and then some
And considerably more, as in I need all the help I can get and then some, or The speaker went on for an hour and then some. This idiom may originally have come from and some, a much older Scottish expression used in the same way. [Early 1900s]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.