自夸；吹嘘；自吹自擂；show off 炫耀
示例
A：She always says her daughter has a very good boyfriend, but when asked when they can get married, she just keeps silence.
B：Obviously, she brags.
A：她总说她女儿有个非常好的男朋友，但每当问到他们什么时候结婚时她就不说话了。
B：很明显，她是在吹牛。
A：I saw UFO last night.
B：Don't brag!
A：昨天晚上我看到不明飞行物了。
B：别吹牛。