stuffed shirt

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++ˌstuffed ˈshirt noun [countable] informal  SERIOUS PERSONsomeone who behaves in a very formal way and thinks that they are important 神气十足的人，妄自尊大的人

Examples from the Corpus

stuffed shirt• Marcus was a true intellectual stuffed shirt.• Modigliani clearly felt no empathy towards the stuffed shirt towering above his wife.

ˌstuffed ˈshirt nounChineseSyllable  

very thinks someone who in and behaves formal way Corpus a

stuffed shirt
ˌstuffed ˈshirt noun [countable] informal
someone who behaves in a very formal way and thinks that they are important

stuffed shirtBrE /ˌstʌft ˈʃɜːt/ 🔊NAmE /ˌstʌft ˈʃɜːrt/ 🔊 noun (informal, disapproving) a person who is very serious, formal or old-fashioned 一本正经的人；古板的人；保守的人