What does "prissiness" mean?

The state or quality of being excessively prim or proper.

Prissiness

Common synonyms include: androgyny, bureaucratism, civility, fastidiousness, formality, moralism.

noun

noun ·Rare ·Advanced level

Noun

1
The state or quality of being excessively prim or proper. uncountable, usually

From prissy + -ness.