too big for one's breeches
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" [syn: bigheaded, persnickety,
snooty, snot-nosed, snotty, stuck-up, uppish]