[chuī niú]
（说大话； 夸口） boast; brag; blast; talk big; talk in high language; draw [pull] a [the] long bow; preen [plume] oneself; (act the) braggadocio
boaster; braggart
吹牛的人
Don't brag.
不要吹牛。
He bragged that his car was the fastest.
他吹牛说他的汽车是最快的。
[名]
bull
He never went to Japan-that's pure bull.
他从没去过日本，那纯属吹牛。