come down with something—
1. provide money or information:
- We need not worry. The firm will come down with the money.
2. be taken ill with a disease:
- The good Deacon almost feared he was about to come down with a fever.
Note: The expression does not correlate in meaning with the phrase come up with something—think of a plan, solution, answer, etc.:
- How on earth did you come up with such a brilliant idea?
go down with something— = come down with something 2:
- Our holiday was fine until Jim went down with a bad cold.