Stuffing usually means: meat, vegetables, sugar, etc. Wrapped in pasta, snacks and other foods. Different words have different meanings:
(1) Stuffing, such as bean paste, sugar, nuts, pulp or chopped meat and vegetables, is wrapped in pasta and cakes. Such as: dumpling stuffing; Moon cakes stuffed with jujube paste; Meat stuffing; Fish stuffing; Filled grass (vegetable stuffing)
(2) the person or thing that is wrapped.
Earth steamed bread outside the city, stuffing grass in the city. -Song Ruan read "Turtle in Poetry"
(3), metaphor all the ins and outs of the secret. Such as: leaking stuffing