大发雷霆

dà fā léi tíng

to fly into a rage

Character by character

大dà
big

发fā
unleash

雷léi
thunder

霆tíng
thunderclap

听说项目又延期了，老板大发雷霆。

When he heard the project was delayed again, the boss hit the roof.

Tone: neutral.

Usually of someone in authority shouting at others; 发 is fā.

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