Prissy means fussily correct and easily shocked. A prissy manner, don't be prissy, prissy about language.
It is always a criticism and it is aimed at women far more than at men, which is worth noticing before reaching for it. The word is probably a blend of prim and sissy, and it first appeared in American writing in 1895.
1adjectiveprissyFussily correct and easily shocked.
“She was too prissy to sit on the grass in case she got her dress dirty.”
prissy is a quality.
PRISsy → a little PRINCE about everything
He sits at the table like a small prince and will not touch the food if the fork has been put down on the wrong side.
hooks ontoprince
American, from 1895, probably a blend of prim and sissy, or of precise and fussy.
1895, either an alteration of precise, prim and sissy, or a prim and fussy; first attested in a work of American writer Joel Chandler Harris.
Etymology from Wiktionary, CC BY-SA