What is Gesundheit?
1.
German, meaning "health". Used to wish someone "health" after sneezing. It has been exported, but seems primarily to be used in the US. Similar is "bless you"
Achoo!
Gesundheit!
You get the idea.
See
2.
Reflex response to a person who has just sneezed.
I forgot to tell you, I sneezed at work the other day and farted at the same time. Ron said "gesundheit", so I'm fairly sure he heard the fart also. It was loud!
See