- dry something up
- dry something up†1. to cause moisture to dry away to nothing. •
Dry this spill up with the hair dryer.
•Will the hair dryer dry up this mess?
2. to cure a skin rash by the use of medicine that dries. •Let's use some of this to try to dry that rash up.
•This medicine will dry up your rash in a few days.
Dictionary of American idioms. 2013.