This is the 14943rd most frequent German word.
salzig
Salzig means "salty" in English.
The word 'salzig' describes the physical property of the taste or chemical nature of seawater.
Das Meerwasser ist sehr salzig.
The seawater is very salty.
Here 'salzig' indicates the taste profile of the soup being slightly too salty for the palate.
Die Suppe schmeckt etwas salzig.
The soup tastes a bit salty.
In this case, 'salzig' is used metaphorically to describe someone's witty or acerbic comment.