persnickety vs too big for one's breeches

persnickety and too big for one's breeches both are adjectives.

Word	Noun	Adjective	Verb	Adverb
persnickety	No	Yes	No	No
too big for one's breeches	No	Yes	No	No

As adjectives, persnickety and too big for one's breeches are synonyms defined as:

persnickety and too big for one's breeches: (used colloquially) overly conceited or arrogant

Other synonyms of persnickety include bigheaded, snooty, snot-nosed, snotty, stuck-up, uppish.

persnickety (adjective)	too big for one's breeches (adjective)
characterized by excessive precision and attention to trivial details	(used colloquially) overly conceited or arrogant
(used colloquially) overly conceited or arrogant