What’s“吹牛”in English

boast

vi.
自夸; 吹牛; 说大话
It is nothing to boast of.
这没有什么可夸耀的。
He boasts too much.
他大话说得太多。

吹牛，口语里常用talk big
如：
He always talks big.
他经常吹牛

关于吹牛的其他表达有：

He blows too much.
他好吹牛。

He is a boastful person.
他就爱吹牛。

boaster，bragger 吹牛大王

He's only boasting.
他只是在吹牛罢了。

talk through one's hat/neck
吹牛皮，信口开河

A boaster and a liar are all one.
吹牛撒谎一家亲。

A boaster and a liar are cousins-german.
吹牛与说谎本是同宗。

Please don't think I'm bragging.
请不要以为我在吹牛。

Don't pay much attention to what he says. He likes to shoot the bull.
别听他的，他喜欢吹牛。 (这个表达很不错）

boast
还有一个很常用的俚语
hot air

Hot air作为俗语就是夸夸其谈,吹牛
Most candidates make promises during a campaign to win voters’ support. But many promises are nothing but hot air. After the candidates