sneeze on (someone or something)
To spray someone or something with one's sneeze. As a parent of toddlers, you get used to your kids sneezing on you accidentally. Don't sneeze on your hands like that—you're just going to spread germs everywhere!
sneeze on someone or something
to aim a sneeze onto someone or something, probably by accident. Don't sneeze on me! Don't sneeze on anything. Cover your nose and mouth!