blow/toot your own horn
to praise your own abilities and achievements 自吹自擂
Do you know Joe Jones next door to me in my dorm? Nobody likes him - he's always blowing his own horn about what a great athlete he is and how much the girls all chase him.
你知道我宿舍里住在我隔壁的那个乔.琼斯吗?因为他老是喜欢吹嘘自己,所以没有一个人喜欢他.他总是夸耀自己是一个多么好的运动员,那些年轻姑娘又如何一个个地苦苦追求他.