TOO BIG FOR ONE'S BREECHES

WordNet Dictionary

	Definition:	[adj] used colloquially of one who is overly conceited or arrogant; "a snotty little scion of a degenerate family"-Laurent Le Sage; "they're snobs--stuck-up and uppity and persnickety"

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	Synonyms:	bigheaded, persnickety, proud, snooty, snot-nosed, snotty, stuck-up, uppish