shower in a can

noun2

1. •
   A dry shower.
2. •
   (humorous) A can of spray-on deodorant, typically used when there is no time for a shower.

   • Many can last without a shower with equal aplomb, until the old nooks and crannies start getting a bit whiffy—even then, though, there's that marvellous modern solution—shower in a can. — 2011