His acceptance speech was full of chest-thumping, which made everyone uncomfortable.

chest-thumping 是由 chest（胸部）和 thumping（重击）组成的复合词。thumping 是动词 thump 的现在分词形式，thump 意思是"重击、捶打"。 chest-thumping 字面意思是"捶打胸膛"，引申为"自吹自擂、炫耀"，常用来形容夸张的自我吹嘘行为。