too big for one's britches
Disturbingly confidentDisturbingly confident; unacceptably cocky.
» You're too big for your britches.
Ти про себе зависокої думки. — deniko
deniko · Tatoeba · CC BY 2.0 FRMeaning
2 senses(idiomatic, not comparable)Disturbingly confident; unacceptably cocky.
(not comparable)Used other than figuratively or idiomatically: Too large to fit into one's pants.
Examples
2 sentencesYou're too big for your britches.
Ти про себе зависокої думки. — deniko
Since his last victory, he's been too big for his britches.
Origin
US origin, 19th c.US origin, 19th c.
Wiktionary, CC BY-SA 4.0 · source