prissily

This term carries a strong negative connotation, suggesting a level of primness that is perceived as affected, unnatural, or irritatingly precise. It describes behavior that is not just neat, but obsessively focused on minor details of etiquette or appearance to signal a sense of moral or social superiority.

Because it is an adverb derived from the informal adjective "prissy," it is rarely used in formal academic or legal writing. It is most appropriate in narrative fiction or descriptive prose to characterize a person's mannerisms as fussy or overly fastidious.