A person who habitually boasts or exaggerates their abilities and achievements but fails to deliver; a braggart or a big talker.
他总是吹嘘自己的能力有多强，结果关键时刻却总是掉链子，真是个牛皮大王。
He always brags about how capable he is, but consistently fails when it matters, truly a 'niúpí dàwáng' (a big talker).
Era:
Modern
Frequency:
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