Ill with, as in He's down with the flu. The down here alludes to being felled by illness. Also see come down with.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
How to use down with in a sentence
There were many who were of the "down-with-everything" order.The Day of Judgment | Joseph Hocking