britches
noun (especially North American English)(also breeches British and North American English)
Idioms short trousers fastened just below the knee 胸针：短裤紧扣在膝盖以下
Idioms
be/get too big for your britches (North American English)
(also be/get too big for your boots British and North American English)
to be/become too proud of yourself; to behave as if you are more important than you really are 自视过高；妄自尊大